ilehpatience1105 ilehpatience1105

25-04-2021
Mathematics

contestada

2
A chord 12 cm long subtends an angle
of 40° at the centre of the circle. Calcu-
late the radius of the circle.

Respuesta :

Rohitknight Rohitknight

01-05-2021

Answer:

Chord 12 cm long subtends an angle of 40 degrees at the center of a circle.

θ= 40° = 0.698 rad

Let R be the radius of circle.

Chord Length = 2Rsin(θ/2)

12=2R sin (0.698 /2)

R= 17.54

Ans: Radius of circle = 17.54 cm

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