Derivation of PL
Product Code : JA-C-3653
Derivation of PL (SKU JA-C-3653) is a magnetic foam circle, 28 cm in diameter, cut into 16 equal sectors, used to show that the area of a circle equals the area of a rectangle made from its parts. The teacher rearranges the sectors on a magnetic board into a shape close to a rectangle whose sides are half the circumference and the radius. This area of circle model suits middle and secondary geometry lessons, and JaincoLab manufactures it.
Specifications
The model is made of foam with magnets on the back, forms a circle of 28 cm diameter and is cut into 16 equal parts, so it can be assembled and rearranged on a magnetic board during a demonstration.
| Product | Derivation of PL |
| SKU | JA-C-3653 |
| Material | Foam with magnets on the back |
| Diameter | 28 cm |
| Parts | 16 equal sectors |
| Use | Demonstration on a magnetic board |
| Demonstrates | Area of a circle equal to the area of a rectangle |
Applications of the area of circle model
In the lesson the 16 sectors are placed alternately point-up and point-down to form an almost rectangular strip, and the class relates its length to half the circumference and its height to the radius to arrive at the formula for the area of a circle.
- Deriving the area of a circle formula
- Relating circumference and radius to the rearranged shape
- Showing that cutting and rearranging keeps the area the same
- Whole-class demonstration on a magnetic board
- Revision of mensuration topics
Scope of supply and ordering
One unit is the 28 cm magnetic foam circle in 16 equal parts. The magnetic board, accessories, spares and quantities are confirmed on the quotation.
MOQ, lead time and packing are stated on each quotation according to the order quantity and the delivery destination. Bulk orders for school maths labs, teacher-training colleges and education programmes are supplied, and export consignments are shipped to buyers in Africa, the Middle East and South and South-East Asia.
Frequently asked questions
What size is the model?
The foam circle is 28 cm in diameter and cut into 16 equal parts.
How is it displayed?
It has magnets on the back and is demonstrated on a magnetic board.
What does it demonstrate?
It demonstrates that the area of a circle is equal to the area of a rectangle formed from its parts.
Related products
Other items in this group are listed in the circle teaching aids range.
Request a quote
Request a quotation for the Derivation of PL (SKU JA-C-3653) through the JaincoLab contact page, giving the quantity required and the delivery destination. Tender and project enquiries can be sent through the tenders page.
