Circle Concepts Kit Circle Kit Circle kit is provided with set of Three circular disk having different radios. This kit help to understand the relationship between the radios, diameter and there circumference. By this kit student can role the circular disk of any surface & can measure the length of the circumference. Magic Ring Magic Ring is a circular plastic ring with outer dia 25 cm & inner dia 20 cm having holes on cirtain distance. The total number of holes on its periphery is 32. This manipulative is designed to understand circle related concepts by placing it on drawing sheet or on white board. Magic ring is to understand the properties of circle, properties of opposite angles of cyclic quadrilateral, Angles in a semicircle is a right angle, Angles in the same segment of a circle are equal. Derivation Of Pie Derivation of Pie This manipulative is made up of foam with magnet at the back to demonstrate on magnetic board with diameter 28 cm cut into 16 equal part. Ring Of Theorems Ring of theorem is use to Understand the properties of circle, properties of opposite angles of cyclic quadrilateral, Angles in a semicircle is a right angle, Angles in the same segment of a circle are equal. This manipulative is provided with rubber bands & reusable storage box..