Finding Area of Semi 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

What is the area of this semi circle? 

• 100.5 square cm

• 25.1  square cm

• 50.3 square cm

• 12.6 square cm

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

• 100.48 cm²

• 80 cm²

• 200.96 cm²

• 25.12 cm²

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

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

• A = π r²

• C = π r²

• A = 1/2 π r²

• A = 2 π r

• A = 2π r²

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

• A = 25.12 sq. inches

• A = 50.24 sq. inches

• A = 31.4 sq. inches

• A = 12.56 sq. inches

A semi-circle is half of a circle. How should the Area formula be changed so that it gives you the Area of a Semi-Circle?

What is the area of this composite shape? (Use 3.14 = π and round to the nearest tenths place)

• 21

• 19.2

• 40.2

• 42

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

• 19.63

• 9.8125

• 9.81

• 39.25