#### EXERCISE 24 A

1. Calculate the length marked by x In each oi the following diagrams. the unit of length being cm. (O is the centre in each diagram)

(i)

(ii)

(iii)

2.In a circle with centre O and radius 13cm , AB is a chord. If OMperpendicularAB and OM=5cm , what is the length of AB ?

3.In a circle of radius 17 cm, find the distance of a chord of length 16cm from tne centre.

4.Circle are concentric with centre O. Find AC if OM=8cm , OC=10cm and OB=17cm

5.A chord , distacne 2cm from the centre , of a circel is 8cm long. Calculate the length of a chord of the same circle which is 6cm distance from the centre.