Radius, Diameter, and Circumference of circles

Front

What is the diameter of a circle?

Back

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

Front

What is the radius of a circle?

Back

The measurement from the center of a circle to an edge of the circle.

Front

How do you calculate the circumference of a circle?

Back

Circumference = π × diameter.

Front

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

Back

31.4 mm.

Front

What is the circumference of a circle with a diameter of 9?

Back

28.26.

Front

What is the relationship between diameter and radius?

Back

Diameter = 2 × radius.

Front

What is the formula for the area of a circle?

Back

Area = π × radius².

Front

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

Back

10 cm.

Front

What is the circumference of a circle with a radius of 7?

Back

43.96.

Front

What does π (pi) represent in circle calculations?

Back

The ratio of the circumference of a circle to its diameter, approximately 3.14.