Circles: Central and Inscribed angles

Front

What is a minor arc?

Back

A minor arc is a portion of a circle that measures less than 180 degrees.

Front

What is a major arc?

Back

A major arc is a portion of a circle that measures greater than 180 degrees.

Front

What is a semicircle?

Back

A semicircle is an arc that measures exactly 180 degrees.

Front

What is the relationship between central angles and intercepted arcs?

Back

The measure of a central angle is equal to the measure of its intercepted arc.

Front

What is an inscribed angle?

Back

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

Front

How do you calculate the measure of an inscribed angle?

Back

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

Front

What is the measure of an angle inscribed in a semicircle?

Back

The measure of an angle inscribed in a semicircle is always 90 degrees.

Front

If the measure of an intercepted arc is 100 degrees, what is the measure of the inscribed angle?

Back

The measure of the inscribed angle is 50 degrees.

Front

What is the formula for the circumference of a circle?

Back

The circumference C of a circle is given by the formula C = 2πr, where r is the radius.

Front

What is the formula for the area of a circle?

Back

The area A of a circle is given by the formula A = πr², where r is the radius.