Area of Semi Circles and Quarter Circles

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

Tags

CCSS.7.G.B.4

What is the area of this semi circle? 

• 100.5 square cm

• 25.1  square cm

• 50.3 square cm

• 12.6 square cm

Tags

CCSS.7.G.B.4

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

• 100.48 cm²

• 80 cm²

• 200.96 cm²

• 25.12 cm²

Tags

CCSS.7.G.B.4

Find the area of the quarter circle. Round you answer to the nearest hundredth.

• 58.88

• 78.50

• 7.85

• 157.00

Tags

CCSS.7.G.B.4

Find the area of this quarter circle with a radius of 18 cm.

• 1017.36 cm

• 254.34 cm

• 26.52 cm

• 123.65 cm

Tags

CCSS.HSG.C.B.5

Fins the area of this quarter circle with a radius of 6 cm.

• 56.52 cm

• 113.04 cm

• 28.26 cm

• 37.68 cm

Tags

CCSS.HSG.C.B.5

Mrs. Wilson placed the welcome mat shown below on her front door step. What is the area of her welcome mat in square feet? Leave in terms of π.

• 2π

• 8π

• 10π

• 4π

Tags

CCSS.7.G.B.4

If you fold a circle in half, what shape have you created?

• Quarter circle

• Semi-circle

• a taco

• another circle

Tags

CCSS.HSG.CO.A.1

Find the area of the semicircle. Round you answer to the nearest hundredth.

• 19.63

• 9.8125

• 9.81

• 39.25

Tags

CCSS.7.G.B.4

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

Tags

CCSS.7.G.B.4