Area and Circumference of a Circle

Front

What is the distance around a circle?

Back

Circumference

Front

The diameter of a circle is:

Back

The distance from an edge of a circle to another edge through the center.

Front

What is the area of a circle with a diameter of 10 cm?

Back

78.5 cm²

Front

What is the diameter of this circle? (If the circumference is 22 cm)

Back

7 cm

Front

What is the formula for circumference of a circle given the diameter?

Back

C = πd

Front

What is the formula for the area of a circle?

Back

A = πr²

Front

If the radius of a circle is 3 cm, what is the circumference?

Back

C = 6π or approximately 18.85 cm

Front

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

Back

A = 16π or approximately 50.27 cm²

Front

What does the term 'radius' refer to in a circle?

Back

The distance from the center of the circle to any point on its edge.

Front

What is the relationship between diameter and radius?

Back

Diameter = 2 × Radius