**A chord of a circle is equal to the radius of the circle. Find the angle subtended by the chord at a point on the minor arc and also at a point on the major arc.**

## Ncert Math Solutions Class 9th Chapter 10 Circles Exercise 10.5 Question 1

**In figure, A, B and C are three points on a circle with centre O such that and . If D is a point on the circle other than the arc ABC, find .**

## Ncert Math Solutions Class 9th Chapter 10 Circles Exercise 10.4 Question 6

**A circular park of radius 20 m is situated in a colony. Three boys Ankur, Syed and David are sitting at equal distance on its boundary each having a toy telephone in his hands to talk each other. Find the length of the string of each phone.**

## Ncert Math Solutions Class 9th Chapter 10 Circles Exercise 10.4 Question 5

**Three girls Reshma, Salma and Mandip are playing a game by standing on a circle of radius 5 m drawn in a park. Reshma throws a ball to Salma, Salma to Mandip, Mandip to Reshma. If the distance between Reshma and Salma and between Salma and Mandip is 6m each, what is the distance between Reshma and Mandip?**

## Ncert Math Solutions Class 9th Chapter 10 Circles Exercise 10.4 Question 4

**If a line intersects two concentric circles (circles with the same centre) with centre O at A, B, C and D, prove that AB = CD (see Figure).**

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