Parts of a Circle 1

Front

What is the definition of a circle?

Back

A circle is a set of points in a plane that are equidistant 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 the circle.

Front

What is the diameter of a circle?

Back

The diameter is a line segment that passes through the center of the circle and connects two points on the circle. It is twice the length of the radius.

Front

How is the diameter related to the radius?

Back

The diameter is equal to 2 times the radius (D = 2r).

Front

What is a chord in a circle?

Back

A chord is a line segment that connects two points on the circle but does not necessarily pass through the center.

Front

What is the relationship between a chord and the diameter?

Back

The diameter is the longest chord in a circle.

Front

What is the circumference of a circle?

Back

The circumference is the distance around the circle, calculated as C = πD or C = 2πr.

Front

What is the area of a circle?

Back

The area of a circle is the space contained within it, calculated as A = πr².

Front

What is a secant line?

Back

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