In a circle with radius of 10 cm, a chord forms a central angle of 60°. What is the length of the chord?
Show answer & explanation
Correct answer: B
Explanation
Given:
Radius of the circle = 10 cm
Central angle = 60°
Formula:
Chord = 2r sin(θ/2)
Chord = 2 × 10 × sin(60°/2)
= 20 × sin30°
= 20 × 1/2 = 10 cm