Central and Inscribed angles practice

Front

What is a radius?

Back

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

Front

What is a diameter?

Back

A diameter is a line segment that passes through the center of a circle and has its endpoints on the circle. It is twice the length of the radius.

Front

What is a chord?

Back

A chord is a line segment whose endpoints lie on the circle.

Front

What is an inscribed angle?

Back

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

Front

What is the relationship between a central angle and an inscribed angle that subtend the same arc?

Back

The measure of a central angle is twice the measure of the inscribed angle.

Front

How do you find the measure of an inscribed angle?

Back

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

Front

What is a semicircle?

Back

A semicircle is half of a circle, formed by a diameter and the arc connecting its endpoints.

Front

If the radius of a circle is 6, what is the diameter?

Back

The diameter is 12, since the diameter is twice the radius.

Front

If the diameter of a circle is 10, what is the radius?

Back

The radius is 5, since the radius is half the diameter.

Front

What is the formula for the circumference of a circle?

Back

The circumference C is given by the formula C = πd, where d is the diameter.