Area of semicircles and quarter circles

Front

What is the shape called that is half of a circle?

Back

Semi-circle.

Front

What is the formula for finding the area of a circle?

Back

A = π r².

Tags

CCSS.7.G.B.4

Front

How do you calculate the area of a semicircle?

Back

Area = (1/2)π r².

Tags

CCSS.7.G.B.4

Front

What is the area of a semicircle with a radius of 10 units?

Back

Area = 157.08 (rounded to the nearest hundredth).

Tags

CCSS.7.G.B.4

Front

What is the shape called that is one-fourth of a circle?

Back

Quarter circle.

Tags

CCSS.HSG.CO.A.1

Front

How do you calculate the area of a quarter circle?

Back

Area = (1/4)π r².

Tags

CCSS.7.G.B.4

Front

What is the area of a quarter circle with a radius of 8 units?

Back

Area = 50.27 (rounded to the nearest hundredth).

Tags

CCSS.7.G.B.4

Front

If the radius of a semicircle is doubled, how does the area change?

Back

The area increases by a factor of four.

Tags

CCSS.7.G.B.4

Front

What is the relationship between the radius and the diameter of a circle?

Back

Diameter = 2 × Radius.

Tags

CCSS.7.G.B.4

Front

What is the area of a circle with a radius of 5 units?

Back

Area = 78.54 (rounded to the nearest hundredth).

Tags

CCSS.7.G.B.4