Question

If a chord of a circle is 48cm long and its distance from the centre is 18cm . Find the diameter of the circle.

Answer 1

Hi,

Explanation:

An half of the chord and the center of the circle make an right triangle.

Using the Pythagorian 's theorem:

R²=24²+18²=900=30²

The diameter of the circle is 2*30 cm=60 cm