Circle Review 1

Front

What is a secant?

Back

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

Front

What is a central angle?

Back

A central angle is an angle whose vertex is at the center of the circle and whose sides are radii that extend to the circle.

Front

What is the measure of a full circle?

Back

360 degrees.

Front

What is the formula for the circumference of a circle?

Back

C = 2πr, where r is the radius.

Front

What is the formula for the area of a circle?

Back

A = πr², where r is the radius.

Front

What is an inscribed angle?

Back

An inscribed angle is formed by two chords in a circle which have a common endpoint.

Front

What is the relationship between an inscribed angle and the arc it intercepts?

Back

The measure of an inscribed angle is half the measure of the intercepted arc.

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 diameter?

Back

A diameter is a chord that passes through the center of the circle and is the longest chord.

Front

What is a radius?

Back

A radius is a line segment from the center of the circle to any point on the circle.