Question

In the given the diameter CD of a circle with center O is perpendicular to the chord AB. If AB = 8 cm and CM = 2 cm, find the radius of the circle.

Answer 1

Answer:

By using Pythagoras Theorem,

r^2 = AB^2 + CM^2

r^2 = 8^2 + 2^2

r^2 = 64 + 4

r^2 = 68

r = √68

r = 2√17 cm.

Answer 2

Answer:

5cm

Step-by-step explanation:

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