Unit 7: Circles Review

Unit 7: Circles Review

Round and round we go!

Multiple Choice

What are the coordinates of the center and the length of the radius for a circle with equation:

(x - 4)² + (y - 3)² = 25 ?

• Center (4,3)

  Radius = 5 units

• Center (4,3)

  Radius = 25 units

• Center (-4,-3)

  Radius = 25 units

• Center (-4,-3)

  Radius = 5 units

Multiple Choice

Write the equation of a circle with center (7, 0) with radius 3.

• (x - 7)² + y² = 9

• x² + (y -7)² = 9

• (x - 7)² + y² = 3

• x² + (y -7)² = 3

Multiple Choice

What does (h,k) standard for in the standard circle equation?

• (h,k) is the center of the circle

• (h,k) is a point on the circle.

• (h,k) is the radius of the circle

• (h,k) is the diameter of the circle

Multiple Choice

What is the standard equation of a circle?

• (x-k)² + (y-h)² = r²

• (x+h)² + (y+k)² = r²

• (x-h)² + (y-k)² = r²

• (k-x)² + (h-y)² = r²

Multiple Choice

Determine the value of all three variables (a, b, c).

•  $55\degree,\ 50\degree,\ 100\degree$  

•  $55\degree,\ 50\degree,\ 55\degree$  

•  $50\degree,\ 55\degree,\ 110\degree$  

•  $50\degree,\ 55\degree,\ 105\degree$  
  

Multiple Choice

In the circle, find the measure of angle CAB.

• A
• B
• C
• D

Multiple Choice

Solve for x.

• x = 35.67
• x = -1
• x = 14
• x = -4.33

Multiple Choice

Find the m∠ABD.

• 14
• 51
• 37
• 65

Multiple Choice

• A

• B

• C

• D

Multiple Choice

What is the measure of angle 2?

• 80
• 45
• 125
• 40

Multiple Choice

Determine the value of z.

• 37.5

• 55

• 57.5

• 75

Multiple Choice

What is the value of x?

• 92
• 25
• 12.5
• 105