Find the area of each circle shown below.
The image shows a) a circle with the diameter of 20 cm and b) a circle with the radius of 7 m.
Area = pi * radius squared
To find the area of a circle, you can use the formula A = πr^2, where A represents the area and r represents the radius.
a) Circle with diameter 20 cm:
The diameter of a circle is the distance from one side of the circle to the other passing through the center. Given the diameter of 20 cm, we can find the radius (r) by dividing the diameter by 2.
r = diameter / 2 = 20 cm / 2 = 10 cm.
Now, we can apply the formula to find the area (A):
A = πr^2 = π(10 cm)^2.
b) Circle with radius 7 m:
The radius of a circle is the distance from the center of the circle to any point on its circumference. Given the radius of 7 m, we can directly apply the formula to find the area (A):
A = πr^2 = π(7 m)^2.
Please note that for both calculations, make sure to use the appropriate value for the constant π.
area = π r^2 = π d^2 / 4
π is pi ... 3.14159...