Unit 8 |Circles Cumulative Assignment

Front

What is a circle?

Back

A circle is a shape consisting of all points in a plane that are a fixed distance (radius) from a central point (center).

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.

Front

What is a chord in a circle?

Back

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

Front

What is a diameter?

Back

The diameter is a chord that passes through the center of the circle and is twice the length of the radius.

Front

What is an arc in a circle?

Back

An arc is a portion of the circumference of a circle.

Front

What is a sector of a circle?

Back

A sector is a region enclosed by two radii and the arc between them.

Front

What is the relationship between the central angle and the arc length?

Back

The length of an arc is directly proportional to the measure of the central angle that subtends it.

Front

What is the inscribed angle theorem?

Back

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

Front

How do you find the measure of an angle formed by two tangents?

Back

The angle formed by two tangents drawn from a point outside the circle is equal to half the difference of the measures of the intercepted arcs.