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### Grade 7 - Mathematics9.6 Area of a Circle - I

 Example: The radius of a circle is 4.9 cm. Find its area. Solution: Given that, The radius of circle (r) = 4.9 cm. The area of a circle = p r2. = 22/7 * (4.9)2 = 22/7 * 4.9 * 4.9 75.46 sq cm. Directions: Read the above example carefully and answer the following questions. Draw 10 different circles on sheet of paper and represent each with different color. Find the area of each of them.
 Q 1: The diameter of a circle is 21 cm. Find its area.3465 sq cm34.65 sq cm346.5 sq cm3.465 sq cm Q 2: Find the raduis of a circle whose area is given by 154 sq cm.5 cm7 cm6 cm10 cm Q 3: Find the diameter of a circle if its area is given by 86.625 sq cm.6 cm5.25 cm10.5 cm12 cm Q 4: The diameter of a circle is 0.98 cm. Find its area.754.6 sq cm7.546 sq cm0.7546 sq cm75.46 sq cm Q 5: Find the diameter of a circle whose area is given by 9.625 sq cm.1.86 cm3.5 cm4.5 cm1.75 cm Q 6: The radius of a circle is 1.4 cm. Find its area.6.16 sq cm0.616 sq cm61.6 sq cm616 sq cm Question 7: This question is available to subscribers only! Question 8: This question is available to subscribers only!