Radius and Circumference of a Circle
★Exhibit Content: Pi ★Interaction: Mechanical Interaction ★Operation: 1. Turn the handwheel clockwise and counterclockwise respectively, observe the retraction and expansion of the semicircle on the digital scale, and experience the relationship between the circumference and radius of a circle; 2. Turn the handwheel and watch the linked changes on the digital scale. ★Exhibit Description: The exhibit consists of two sets of demonstrations, one demonstrating pi and the other demonstrating the relationship between circumference and radius. On the left is a scale marked with numbers and a sector structure. When the handwheel is turned, the sector retracts and expands. On the right are two disc structures, large and small. When the handwheel is turned, both discs rotate simultaneously; after the large circle makes one full rotation, the small circle makes exactly three rotations. Through the interactive device, visitors can clearly understand the relationship between circumference and radius. ★Scientific Principle: When a line segment rotates around one of its endpoints in a plane for one full revolution, the path traced by its other endpoint is called a circle. The line segment connecting the center of the circle and any point on the circle is called the radius, denoted by the letter r. The circumference of a circle C=2πr=πd. Here π refers to pi, generally taken as 3.14. Pi is the ratio of a circle's circumference to its diameter, generally represented by the Greek letter π, and is a mathematical constant ubiquitous in mathematics and physics.
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- 1.2*0.6*1.4m 1.2*0.6*1.4mDimensions: 1.2*0.6*1.4m Brand: KexMall Model: PopsciCat-math-027 1. Materials: ①Frame: 2mm cold-rolled sheet frame, 2.0mm cold-rolled sheet enclosure, surface powder-coated ②Tabletop: Kelaisi artificial stone, thickness ≥12mm, with flame-retardant board underneath ③Instruction sign, graphic panel: 5mm acrylic UV printing ④Turntable demonstration components: cold-rolled steel plate and steel + 304 stainless steel ⑤Protective cover: transparent acrylic + custom-colored acrylic as needed ⑥Handwheel: 15mm transparent acrylic + 304 stainless steel ⑦Accessories: scale, sector structure, base plate 2. Main configuration: None 3. Installation requirements: ①Energy requirement: Not required ②Installation base: Floor placement ③Entry passage: Door frame size (width×height) ≥0.3m×1.9m, continuous turning interval in passage ≥1.5m ④Maintenance access: Not required
★Exhibit Content: Pi ★Interaction: Mechanical Interaction ★Operation: 1. Turn the handwheel clockwise and counterclockwise respectively, observe the retraction and expansion of the semicircle on the digital scale, and experience the relationship between the circumference and radius of a circle; 2. Turn the handwheel and watch the linked changes on the digital scale. ★Exhibit Description: The exhibit consists of two sets of demonstrations, one demonstrating pi and the other demonstrating the relationship between circumference and radius. On the left is a scale marked with numbers and a sector structure. When the handwheel is turned, the sector retracts and expands. On the right are two disc structures, large and small. When the handwheel is turned, both discs rotate simultaneously; after the large circle makes one full rotation, the small circle makes exactly three rotations. Through the interactive device, visitors can clearly understand the relationship between circumference and radius. ★Scientific Principle: When a line segment rotates around one of its endpoints in a plane for one full revolution, the path traced by its other endpoint is called a circle. The line segment connecting the center of the circle and any point on the circle is called the radius, denoted by the letter r. The circumference of a circle C=2πr=πd. Here π refers to pi, generally taken as 3.14. Pi is the ratio of a circle's circumference to its diameter, generally represented by the Greek letter π, and is a mathematical constant ubiquitous in mathematics and physics.
- 1.4*0.2*1.2m · Style 1 1.4*0.2*1.2mDimensions: 1.4*0.2*1.2m Brand: KexMall Model: PopsciCat-math-028 1. Materials: ①Frame: 2mm cold-rolled sheet frame, 2.0mm cold-rolled sheet enclosure, surface powder-coated ②Outer side: cold-rolled sheet, thickness ≥1.5mm ③Instruction sign, graphic panel: 5mm acrylic UV printing ④Turntable demonstration components: cold-rolled steel plate and steel + 304 stainless steel ⑤Protective cover: transparent acrylic + custom-colored acrylic as needed ⑥Handwheel: 15mm transparent acrylic + 304 stainless steel ⑦Accessories: disc (large), disc (small), scale, sector structure, base plate 2. Main configuration: None 3. Installation requirements: ①Energy requirement: Not required ②Installation base: Wall-mounted (solid wall or studs, recommended mounting height: center point 1.3m above floor) ③Entry passage: Door frame size (width×height) ≥0.3m×1.9m, continuous turning interval in passage ≥1.5m ④Maintenance access: Not required
★Exhibit Content: Pi ★Interaction: Mechanical Interaction ★Operation: 1. Turn the handwheel clockwise and counterclockwise respectively, observe the retraction and expansion of the semicircle on the digital scale, and experience the relationship between the circumference and radius of a circle; 2. Turn the handwheel and watch the linked changes on the digital scale. ★Exhibit Description: The exhibit consists of two sets of demonstrations, one demonstrating pi and the other demonstrating the relationship between circumference and radius. On the left is a scale marked with numbers and a sector structure. When the handwheel is turned, the sector retracts and expands. On the right are two disc structures, large and small. When the handwheel is turned, both discs rotate simultaneously; after the large circle makes one full rotation, the small circle makes exactly three rotations. Through the interactive device, visitors can clearly understand the relationship between circumference and radius. ★Scientific Principle: When a line segment rotates around one of its endpoints in a plane for one full revolution, the path traced by its other endpoint is called a circle. The line segment connecting the center of the circle and any point on the circle is called the radius, denoted by the letter r. The circumference of a circle C=2πr=πd. Here π refers to pi, generally taken as 3.14. Pi is the ratio of a circle's circumference to its diameter, generally represented by the Greek letter π, and is a mathematical constant ubiquitous in mathematics and physics.
- 1.2*0.25*1.4m 1.2*0.25*1.4mDimensions: 1.2*0.25*1.4m Brand: KexMall Model: PopsciCat-math-029 1. Materials: ①Display stand: 2mm cold-rolled sheet frame, 2.0mm cold-rolled sheet enclosure, surface powder-coated ②Outer side: cold-rolled sheet, thickness ≥1.5mm ③Instruction sign, graphic panel: 5mm acrylic UV printing ④Turntable demonstration components: cold-rolled steel plate and steel + 304 stainless steel ⑤Protective cover: transparent acrylic + custom-colored acrylic as needed ⑥Handwheel: 12mm transparent acrylic + 304 stainless steel ⑦Accessories: disc (large), disc (small), scale, sector structure, base plate 2. Main configuration: None 3. Installation requirements: ①Energy requirement: Not required ②Installation base: Floor placement ③Entry passage: Door frame size (width×height) ≥0.5m×1.9m, continuous turning interval in passage ≥1.5m ④Maintenance access: Not required
★Exhibit Content: Pi ★Interaction: Mechanical Interaction ★Operation: 1. Turn the handwheel clockwise and counterclockwise respectively, observe the retraction and expansion of the semicircle on the digital scale, and experience the relationship between the circumference and radius of a circle; 2. Turn the handwheel and watch the linked changes on the digital scale. ★Exhibit Description: The exhibit consists of two sets of demonstrations, one demonstrating pi and the other demonstrating the relationship between circumference and radius. On the left is a scale marked with numbers and a sector structure. When the handwheel is turned, the sector retracts and expands. On the right are two disc structures, large and small. When the handwheel is turned, both discs rotate simultaneously; after the large circle makes one full rotation, the small circle makes exactly three rotations. Through the interactive device, visitors can clearly understand the relationship between circumference and radius. ★Scientific Principle: When a line segment rotates around one of its endpoints in a plane for one full revolution, the path traced by its other endpoint is called a circle. The line segment connecting the center of the circle and any point on the circle is called the radius, denoted by the letter r. The circumference of a circle C=2πr=πd. Here π refers to pi, generally taken as 3.14. Pi is the ratio of a circle's circumference to its diameter, generally represented by the Greek letter π, and is a mathematical constant ubiquitous in mathematics and physics.
- Φ1.4*0.2m Φ1.4*0.2mDimensions: Φ1.4*0.2m Brand: KexMall Model: PopsciCat-math-030 1. Materials: ①Frame: 2mm cold-rolled sheet frame, 2.0mm cold-rolled sheet enclosure, surface powder-coated ②Outer side: cold-rolled sheet, thickness ≥1.5mm ③Instruction sign, graphic panel: 5mm acrylic UV printing ④Turntable demonstration components: cold-rolled steel plate and steel + 304 stainless steel ⑤Protective cover: transparent acrylic + custom-colored acrylic as needed ⑥Handwheel: 15mm transparent acrylic + 304 stainless steel ⑦Accessories: disc (large), disc (small), scale, sector structure, base plate 2. Main configuration: None 3. Installation requirements: ①Energy requirement: Not required ②Installation base: Wall-mounted (solid wall or studs, recommended mounting height: center point 1.3m above floor) ③Entry passage: Door frame size (width×height) ≥0.3m×1.9m, continuous turning interval in passage ≥1.5m ④Maintenance access: Not required
★Exhibit Content: Pi ★Interaction: Mechanical Interaction ★Operation: 1. Turn the handwheel clockwise and counterclockwise respectively, observe the retraction and expansion of the semicircle on the digital scale, and experience the relationship between the circumference and radius of a circle; 2. Turn the handwheel and watch the linked changes on the digital scale. ★Exhibit Description: The exhibit consists of two sets of demonstrations, one demonstrating pi and the other demonstrating the relationship between circumference and radius. On the left is a scale marked with numbers and a sector structure. When the handwheel is turned, the sector retracts and expands. On the right are two disc structures, large and small. When the handwheel is turned, both discs rotate simultaneously; after the large circle makes one full rotation, the small circle makes exactly three rotations. Through the interactive device, visitors can clearly understand the relationship between circumference and radius. ★Scientific Principle: When a line segment rotates around one of its endpoints in a plane for one full revolution, the path traced by its other endpoint is called a circle. The line segment connecting the center of the circle and any point on the circle is called the radius, denoted by the letter r. The circumference of a circle C=2πr=πd. Here π refers to pi, generally taken as 3.14. Pi is the ratio of a circle's circumference to its diameter, generally represented by the Greek letter π, and is a mathematical constant ubiquitous in mathematics and physics.
- 1.4*0.2*1.2m · Style 2 1.4*0.2*1.2mDimensions: 1.4*0.2*1.2m Brand: KexMall Model: PopsciCat-math-031 1. Materials: ①Frame: 2mm cold-rolled sheet frame, 2.0mm cold-rolled sheet enclosure, surface powder-coated ②Outer side: cold-rolled sheet, thickness ≥1.5mm ③Instruction sign, graphic panel: 5mm acrylic UV printing ④Turntable demonstration components: cold-rolled steel plate and steel + 304 stainless steel ⑤Protective cover: transparent acrylic + custom-colored acrylic as needed ⑥Handwheel: 15mm transparent acrylic + 304 stainless steel ⑦Accessories: disc, scale, sector structure, base plate 2. Main configuration: None 3. Installation requirements: ①Energy requirement: Not required ②Installation base: Wall-mounted (solid wall or studs, recommended mounting height: center point 1.3m above floor) ③Entry passage: Door frame size (width×height) ≥0.3m×1.9m, continuous turning interval in passage ≥1.5m ④Maintenance access: Not required
★Exhibit Content: Pi ★Interaction: Mechanical Interaction ★Operation: 1. Turn the handwheel clockwise and counterclockwise respectively, observe the retraction and expansion of the semicircle on the digital scale, and experience the relationship between the circumference and radius of a circle; 2. Turn the handwheel and watch the linked changes on the digital scale. ★Exhibit Description: The exhibit consists of two sets of demonstrations, one demonstrating pi and the other demonstrating the relationship between circumference and radius. On the left is a scale marked with numbers and a sector structure. When the handwheel is turned, the sector retracts and expands. On the right are two disc structures, large and small. When the handwheel is turned, both discs rotate simultaneously; after the large circle makes one full rotation, the small circle makes exactly three rotations. Through the interactive device, visitors can clearly understand the relationship between circumference and radius. ★Scientific Principle: When a line segment rotates around one of its endpoints in a plane for one full revolution, the path traced by its other endpoint is called a circle. The line segment connecting the center of the circle and any point on the circle is called the radius, denoted by the letter r. The circumference of a circle C=2πr=πd. Here π refers to pi, generally taken as 3.14. Pi is the ratio of a circle's circumference to its diameter, generally represented by the Greek letter π, and is a mathematical constant ubiquitous in mathematics and physics.
- 1.2*0.2*0.3m 1.2*0.2*0.3mDimensions: 1.2*0.2*0.3m Brand: KexMall Model: PopsciCat-math-032 1. Materials: ①Frame: 2mm cold-rolled sheet frame, 2.0mm cold-rolled sheet enclosure, surface powder-coated ②Outer side: cold-rolled sheet, thickness ≥1.5mm ③Instruction sign, graphic panel: 5mm acrylic UV printing ④Turntable demonstration components: cold-rolled steel + aluminum alloy + stainless steel ⑤Protective cover: transparent acrylic 2. Main configuration: None 3. Installation requirements: ①Energy requirement: Not required ②Installation base: Wall-mounted (solid wall or studs, recommended mounting height: center point 1.3m above floor) ③Entry passage: Door frame size (width×height) ≥0.3m×1.9m, continuous turning interval in passage ≥1.5m ④Maintenance access: Not required
★Exhibit Content: Pi ★Interaction: Mechanical Interaction ★Operation: Move the roller and watch the linked changes on the digital scale to experience the relationship between the circumference and radius of a circle. ★Exhibit Description: The exhibit is a demonstration mechanism showing the relationship between circumference and radius, consisting of one rollable disc structure and a section of scale. When the disc is rotated, after one full rotation it stops exactly at the π value of 3.14. Through the interactive device, visitors can clearly understand the relationship between circumference and radius. ★Scientific Principle: When a line segment rotates around one of its endpoints in a plane for one full revolution, the path traced by its other endpoint is called a circle. The line segment connecting the center of the circle and any point on the circle is called the radius, denoted by the letter r. The circumference of a circle C=2πr=πd. Here π refers to pi, generally taken as 3.14. Pi is the ratio of a circle's circumference to its diameter, generally represented by the Greek letter π, and is a mathematical constant ubiquitous in mathematics and physics.
Review
Principle Display: ★★★ Interaction Effect: ★★★★ Ease of Installation: ★★★★★ Durability: ★★★★ Overall Rating: ★★★★