An arc of a circle makes a 36° angle at its centre. If the arc has length 26 cm, find the radius of the circle.
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Answer:
Length of an arc subtending an angle θ=
360
θ
×2πR where R is the radius of the circle.
Also, 2π×R is the formula to calculate the Circumference of the circle.
So, 176=
360
36
× Circumference
Hence, Circumference of the circle =1760cm
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