In a circle, there is a chord measuring 20 cm that is located 15 cm away from the center. What is the approximate radius of the circle?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 18 cm.
Half chord AP = 20/2 = 10 cm
Radius OA = √(102 + 152) = √(100 + 225) = √325 ≈ 18 cm