A sector of 100 degree cut off from a circle contains 70.65 cm2. Find the radio of the circle
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Area of sector= °/360° ×πrr
70.65=100/360×22/7×r×r
(70.65×36×7)/10×22=r×r
r×r=80.92
approximately 81
r×r=81
therefore r=9cm
so the radius of the circle is 9 cm
70.65=100/360×22/7×r×r
(70.65×36×7)/10×22=r×r
r×r=80.92
approximately 81
r×r=81
therefore r=9cm
so the radius of the circle is 9 cm
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