Circle introduction

Front

What is a circle?

Back

A circle is a round shape where all points are the same distance from the center.

Front

What is the center of a circle?

Back

The center is the point that is equidistant from all points on the circle.

Front

What is a radius?

Back

A radius is a line segment from the center of the circle to any point on the circle.

Front

What is a diameter?

Back

A diameter is a line segment that passes through the center of the circle and connects two points on the circle.

Front

How is the diameter related to the radius?

Back

The diameter is twice the length of the radius.

Front

If the radius is 10ft, what is the diameter?

Back

20ft

Front

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

Back

Circumference = π × diameter.

Front

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

Back

Area = π × radius².

Front

What is π (pi)?

Back

π (pi) is a constant approximately equal to 3.14, used in calculations involving circles.

Front

What is the relationship between radius and circumference?

Back

The circumference can be calculated using the radius: Circumference = 2 × π × radius.