Circles, Angles and Segments

Front

An angle is a(n) ______ if the vertex is on a circle and the sides of the angle are chords of the circle.

Back

inscribed angle

Front

A(n) _____ to a circle is a line, ray or segment in the plane of the circle that intersects the circle in exactly one point.

Back

tangent

Front

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

Back

C = 2πr, where r is the radius.

Front

What is the area of a circle with radius r?

Back

A = πr².

Front

What do you call a line segment that connects two points on a circle?

Back

Chord.

Front

What is the term for the distance from the center of a circle to any point on the circle?

Back

Radius.

Front

What is the measure of a right angle?

Back

90 degrees.

Front

What is the sum of the angles in a triangle?

Back

180 degrees.

Front

If two angles are complementary, what is the sum of their measures?

Back

90 degrees.

Front

If two angles are supplementary, what is the sum of their measures?

Back

180 degrees.