Calculate the perimeter and area of a quadrant of the circles whose radii are,
(i) 98 cm (ii) 70 cm (iii) 42 m (iv) 28 m
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Answer:
Perimeter of circle = 2 π R
Area of a circle = πR²
Step-by-step explanation:
Perimeter of circle = 2 π R
Area of a circle = πR²
π = 22/7
Radius = 98 cm
Perimeter = 2 * (22/7 ) * 98 = 616 cm
Area = (22/7 ) * 98² = 30184 cm²
Radius = 70 cm
Perimeter = 2 * (22/7 ) * 70 = 440 cm
Area = (22/7 ) * 70² = 15400 cm²
Radius = 42 cm
Perimeter = 2 * (22/7 ) * 42 = 264 cm
Area = (22/7 ) * 42² = 5544 cm²
Radius = 28 cm
Perimeter = 2 * (22/7 ) * 28 = 176 cm
Area = (22/7 ) * 28² = 2464 cm²
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