Question

A chord of length 4.2cm is 2.8cm from the center of a circle. Calculate the length of the radius of the circle.​

Answer 1

3.5 cm

Explanation:

Radius of circle = √(Distance from chord)² + (Half chord length)²

= √(2.8)² + (2.1)²

= √7.84 + 4.41

= √12.25

= 3.5 cm