Area of Circles and Semi-Circles

Find the area of the circle

• 56.52

• 254.34

• 1017.36

• 113.04

What is the area of a circle with the diameter of 10cm ?

• 66cm

• 78.5cm

• 66.5cm

• 10m

Find the area of the circle below.

• 100 cm

• 225 cm

• 9 cm

• 28.26 cm

What is the area of this circle?

• 163.2

• 15.3

• 124.2

• 113.04

what is the formula for finding the area of a semi-circle

• A = π r²

• C = π r²

• A = π r² / 2

• A = 2 π r

What is the area of this circle?

• 62.59 cm²

• 113.1 cm²

• 19.81 cm²

• 28.26 cm²

What is the area of this circle?
d = 8cm

• 16π

• 8π

• 4π

• 36π

what is the area of this semicircle ?
d = 8 cm 

• 100.48 cm²

• 80 cm²

• 200.96 cm²

• 25.12 cm²

What is/are the formula(s) to find the area of a circle?

• πr²

• 2πr

• √π

Jesse used rope to stake a circular region in which to plant a garden. The diameter of the region is 20 inches. What is the approximate area of half of the garden?

• 31.4 in²

• 314 in²

• 157 in²

• 628 in²