Tangent Lines and Circles

Front

A line segment that passes through the center of a circle, connecting two points on a circle is called ________________.

Back

diameter

Front

The distance from the center of a circle to any point on its circumference is called ________________.

Back

radius

Front

The total distance around a circle is known as ________________.

Back

circumference

Front

The area of a circle is calculated using the formula ________________.

Back

A = πr²

Front

A line that touches a circle at exactly one point is called ________________.

Back

tangent line

Front

If a tangent line is drawn to a circle, the radius drawn to the point of tangency is ________________.

Back

perpendicular to the tangent line.

Front

The point where a tangent line touches a circle is called ________________.

Back

point of tangency

Front

If two tangents are drawn from a point outside a circle, the lengths of the tangents are ________________.

Back

equal.

Front

The relationship between the radius and the diameter of a circle is ________________.

Back

Diameter = 2 × Radius

Front

What is the diameter of a circle with a radius of 8 units?

Back

16 units