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11-04-2021
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a chord is 4cm from the centre of a circle of radius 7cm . calculate the angle subtended by the chord at the centre

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zarampa zarampa

12-04-2021

Answer:

32.757°

Explanation:

c = 2*3.14* r

c = circunference, perímeter o the circle

r = radius

c = 2*3.14*7cm

c = 43.96cm

Proportions:

43.96cm ⇒ 360°

4cm ⇒ C°

C = 360*4/43.96

C = 32.757°

the angle subtended by the chord at the centre:

32.757°

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