Question

How far is a chord of length 8 cm from the centre of a circle of radius 5 cm

Answer 1

• Answer:

OB = 3 cm

• Step-by-step explanation:

AO = radius = 5 cm

AB = 8cm/2 = 4 cm

Pythagora

OB² = AO² - AB²

= (5cm)² - (4cm)²

= 25cm² - 16cm²

= 9 cm²

OB = √9cm²

= 3 cm