Circles Unit Assessment

What is the center?

• P

• Q

• V

• S

Which of the following is a diameter?

• VP

• UQ

• RS

• PQ

Which of the following is a point of tangency?

• P

• T

• R

• S

Find the measure of arc ED.

• arc ED = 52^o

• arc ED = 90^o

• arc ED = 38^o

• arc ED = 104^o

What is the equation of a circle with a center at (4 , -1) and a radius of 9?

• (x + 4)² + (y - 1)² = 9

• (x + 4)² + (y - 1)² = 81

• (x - 4)² + (y + 1)² = 9

• (x - 4)² + (y + 1)² = 81

Which of the following correctly gives the center and radius of a circle defined by the equation:

(x - 7)² + (y - 2)² = 100

• Center: (7 , 2)

  Radius: 100

• Center: (7 , 2)

  Radius: 10

• Center: (-7, -2)

  Radius: 100

• Center: (-7, -2)

  Radius: 10

Which equation represents the circle shown on the graph?

• x² + (y - 3)² = 4

• x² + (y + 3)² = 4

• x² + (y - 3)² = 16

• x² + (y + 3)² = 16

Which equation represents a circle with a center at (-2 , 2) and a circumference of 16pi.

• (x + 2)² + (y - 2)² = 64

• (x - 2)² + (y + 2)² = 64

• (x + 2)² + (y - 2)² = 256

• (x - 2)² + (y + 2)² = 256

If the circumference of a circle is 22 π ft, what is the radius?

• 22 ft
• 11ft
• π ft
• no ft

A _____ is half of a circle.

• circumference
• pi
• semicircle
•  composite figure