NC Math 3 Review 3

Front

What is the value of x if the options are 54°, 75°, 78°, and 102°?

Back

54°

Front

In Circle O, if CE = 10, ED = 6, and AE = 4, what is the length of EB?

Back

15

Front

What three-dimensional figure is generated when a quarter circle is rotated about the y-axis?

Back

hemisphere

Front

What is the minimum degree of a polynomial with roots at x=±1 and x=2i?

Back

4

Front

If the diameter of a circle is 8 cm and a central angle intercepts an arc of 12 cm, what is the radian measure of the central angle?

Back

3

Front

Define a chord in a circle.

Back

A chord is a line segment with both endpoints on the circle.

Front

What is the relationship between the diameter and radius of a circle?

Back

The diameter is twice the length of the radius.

Front

Explain the concept of a central angle in 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 formula for the circumference of a circle?

Back

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

Front

What is the area of a circle with radius r?

Back

The area A is given by A = πr².