Chapter 10 Test- Circles

Front

What is the definition of a circle?

Back

A circle is a set of points in a plane that are equidistant from a fixed point called the center.

Front

What is the standard equation of a circle?

Back

The standard equation of a circle is (x - h)² + (y - k)² = r², where (h, k) is the center and r is the radius.

Front

What does the radius of a circle represent?

Back

The radius is the distance from the center of the circle to any point on the circle.

Front

How do you find 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 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 the relationship between the diameter and the radius?

Back

The diameter d of a circle is twice the radius: d = 2r.

Front

What is an arc in a circle?

Back

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

Front

What is a chord in a circle?

Back

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

Front

What is the central angle of a circle?

Back

A central angle is an angle whose vertex is at the center of the circle and whose sides intersect the circle.

Front

What is the measure of a semicircle?

Back

The measure of a semicircle is 180 degrees.