1] the perimeter of a quadrant of a circle of radius ' r ' is ___________. 2] Area of a quadrant of circle whose circomference is 22cm is ____________.
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1) Area of a quadrant
= πr^2/4
2) Circumference = 2πr = 22 cm
2×22/7 × r = 22
r = 7/2 cm
Area of a quadrant = πr^2/4
= 22/7 × 7/2× 7/2 ×1/4
= 22×7×7/7×2×2×4
= 77/8
= 9.6 cm^2
= πr^2/4
2) Circumference = 2πr = 22 cm
2×22/7 × r = 22
r = 7/2 cm
Area of a quadrant = πr^2/4
= 22/7 × 7/2× 7/2 ×1/4
= 22×7×7/7×2×2×4
= 77/8
= 9.6 cm^2
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