Chapter 8-2: Area of Circles & Semicircles

What does area mean?

• the distance around a shape
• half the distance around a shape
• the amount of space outside a shape
• the amount of space inside a shape

What is the formula to find the area of a circle?

• A = πd

• A = 2πr

• A = πr²

• A = xyz

Tags

CCSS.7.G.B.4

What is the area of this circle? Use 22/7 for pi. Round to the nearest tenth.

• 163.2
• 15.3
• 124.2
• 113.1

Tags

CCSS.7.G.B.4

What is the area of this circle? Use 3.14 for pi.

• 1256

• 31.4

• 314

• 62.8

Tags

CCSS.7.G.B.4

What is the area of this circle? Use 22/7 for pi. Round to the nearest tenth.

• 201.1

• 50.3

• 12.6

• 25.1

Tags

CCSS.7.G.B.4

Which is the formula for finding the area of a semicircle?

• A = π r²

• C = π r²

• A = 1/2 π r²

• A = 2 π r

Tags

CCSS.7.G.B.4

What is the area of this semicircle? Use 3.14 for pi. Round to the nearest tenth.

• 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 a semicircle with the diameter of 15 centimeters? Use 3.14 for pi. Round to the nearest hundredth.

• 11.78 cm²

• 176.63 cm²

• 353.25 cm²

• 88.31 cm²

Tags

CCSS.7.G.B.4

The definition of diameter is

• distance from the center of any point on the circle

• distance across the circle through the center

• distance from one point to another

• distance around the circle

Tags

CCSS.HSG.C.A.2

The definition of radius is

• distance from one point to another point

• distance around the circle

• distance from the center to any point on the circle

• distance across the circle through the center

Tags

CCSS.HSG.C.A.2