Circle Properties

Front

What is a circle?

Back

A circle is a shape consisting of all points in a plane that are a fixed distance (radius) from a central point (center).

Front

Define radius in 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

What is the circumference of a circle?

Back

Front

What is a tangent line?

Back

A tangent line is a straight line that touches the circle at exactly one point and does not cross it.

Front

What is a chord in a circle?

Back

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

Front

What is an arc in a circle?

Back

An arc is a portion of the circumference of a circle.

Front

How do you calculate the length of an arc?

Back

Front

What is the relationship between the central angle and the inscribed angle?

Back

The inscribed angle is half the measure of the central angle that subtends the same arc.

Front

What is the formula for the area of a circle?

Back