Question

10.A chord of a circle of radius 7.5cm with centre O is of length 9cm .Find the its distance from the centre. (a) 4cm (b) 7cm (c) 6cm (d) 5cm.​

Answer 1

Answer:

b) 7cm

this is the answer

Answer 2

Step-by-step explanation:

given: OA = 7.5cm.

AC = 1/2 AB = 1/2 × 9 = 4.5

OC = ?

OA² = OC² + AC²

(7.5)² = OC² + (4.5)²

56.25 = OC² + 20.25

OC² = 56.25 - 20.25

OC² = 36

OC = √36

OC = 6cm