Circle Parts

Front

What is a circle?

Back

A circle is a shape consisting of all points in a plane that are at a given distance from a fixed point, called the center.

Front

What is the center of a circle?

Back

The center of a circle is the fixed point from which all points on the circle are equidistant.

Front

What is the radius of a circle?

Back

The radius is the distance from the center of the circle to any point on its circumference.

Front

What is the diameter of a circle?

Back

The diameter is the distance across the circle through the center, equal to twice the radius.

Front

How do you calculate the circumference of a circle?

Back

Circumference can be calculated using the formula C = 2πr, where r is the radius.

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the radius (D = 2r).

Front

What is the area of a circle?

Back

The area can be calculated using the formula A = πr², where r is the radius.

Front

What is a chord in a circle?

Back

A chord is a line segment with both endpoints on the circle.

Front

What is a tangent to a circle?

Back

A tangent is a line that touches the circle at exactly one point.

Front

What is a secant line?

Back

A secant line is a line that intersects the circle at two points.