Circumference & Area of Circles & Semi-Circles

Front

What is the definition of radius?

Back

The distance from the center to any point on the circle.

Front

What is the formula for finding diameter?

Back

d = 2r

Tags

CCSS.7.G.B.4

Front

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

Back

A = πr²

Tags

CCSS.7.G.B.4

Front

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

Back

C = 2πr

Tags

CCSS.7.G.B.4

Front

What is the area of a semi-circle?

Back

A = (1/2)πr²

Tags

CCSS.7.G.B.4

Front

If the radius of a circle is 4 cm, what is the diameter?

Back

8 cm

Tags

CCSS.7.G.B.4

Front

If the radius of a circle is 5 cm, what is the area?

Back

25π cm²

Tags

CCSS.7.G.B.4

Front

If the diameter of a circle is 10 cm, what is the circumference?

Back

10π cm

Tags

CCSS.7.G.B.4

Front

What is the relationship between radius and diameter?

Back

Diameter is twice the radius.

Tags

CCSS.7.G.B.4

Front

What is the area of a circle with a radius of 3 cm?

Back

9π cm²

Tags

CCSS.7.G.B.4