Magic Ring
Product Code : JA-C-3649
The Magic Ring (SKU JA-C-3649) is a circular plastic ring with an outer diameter of 25 cm and an inner diameter of 20 cm, with holes at fixed distances around it. Placed on a drawing sheet or a whiteboard, this circle theorem magic ring lets pupils mark points on a circle and draw chords and angles to check the properties of the circle. It serves secondary geometry lessons and school maths labs, and JaincoLab manufactures it.
Specifications
The ring is made of plastic, measures 25 cm across the outside and 20 cm across the inside, and has holes at fixed distances so a pencil or marker can mark points on the circle; it is used flat on a drawing sheet or whiteboard.
| Product | Magic Ring |
| SKU | JA-C-3649 |
| Material | Plastic |
| Outer diameter | 25 cm |
| Inner diameter | 20 cm |
| Marking holes | Holes at fixed distances around the ring |
| Use surface | Drawing sheet or whiteboard |
Applications of the circle theorem magic ring
Pupils mark points through the holes, join them into chords, triangles and quadrilaterals, and measure the angles to check the circle theorems studied in secondary classes, repeating the construction quickly for several different sets of points.
- Properties of a circle, such as radius, chord and arc
- Opposite angles of a cyclic quadrilateral add up to 180°
- The angle in a semicircle is a right angle
- Angles in the same segment of a circle are equal
- Board demonstrations and drawing-sheet activities
Scope of supply and ordering
One unit is one plastic Magic Ring, 25 cm outer and 20 cm inner diameter. 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 are the dimensions of the Magic Ring?
It has an outer diameter of 25 cm and an inner diameter of 20 cm.
Which theorems can be shown with it?
Properties of the circle, opposite angles of a cyclic quadrilateral, the angle in a semicircle being a right angle, and angles in the same segment being equal.
Can it be used on a whiteboard?
Yes. It is designed to be placed on a drawing sheet or on a whiteboard.
Related products
Other items in this group are listed in the circle teaching aids range.
Request a quote
Request a quotation for the Magic Ring (SKU JA-C-3649) through the JaincoLab contact page, giving the quantity required and the delivery destination. Tender and project enquiries can be sent through the tenders page.
