Find the area of a circle of radius:
a. 7cm
b. 14cm
c. 10.5
Use pi= 22/7.
Area of circle:
Area = pi*r^2
a)
(22/7)*7^2 = 154 cm^2
try it
To find the area of a circle, you can use the formula:
Area = π * radius^2
Given that π = 22/7, let's calculate the areas for the given radii:
a. Radius = 7cm
Area = (22/7) * (7^2)
Area = (22/7) * 49
Area ≈ 154 cm^2
b. Radius = 14cm
Area = (22/7) * (14^2)
Area = (22/7) * 196
Area ≈ 616 cm^2
c. Radius = 10.5cm
Area = (22/7) * (10.5^2)
Area = (22/7) * 110.25
Area ≈ 346.5 cm^2
So, the areas of the circles with radius 7cm, 14cm, and 10.5cm are approximately 154 cm^2, 616 cm^2, and 346.5 cm^2, respectively.