Question

a chord is 4cm from the centre of a circle of radius 7cm . calculate the angle subtended by the chord at the centre​

Answer 1

32.757°

Step-by-step 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°