Math Circle Review

Which graph corresponds to 
(x-8)²+ (y+2)²=

• A

• B

• C

• D

What is the radius of a circle with the following equation?

x² + y² - 8x + 10y - 8 = 0

• 7

• 14

• 49

• 24.5

A circle has a radius of 5 inches. What is the length of an arc that has a central angle of 2π/3 radians?

• 10π/3 inches

• 2π/15 inches

• π/5 inches

• 5π/3 inches

• A
• B
• C
• D

• A
• B
• C
• D

You start on the unit circle at (0, -1) and move 300° counterclockwise. Which angle (in degrees) will you end up on the unit circle?

• 30

• 330

• 210

• 120

What is the length of a radius of the circle represented by the equation x²+y²-4x-4y+4=0?

• 2 units

• 4 units

• 8 units

• 16 units

• (1)

• (2)

• (3)

• (4)

• (1)

• (2)

• (3)

• (4)

• A

• B

• C

• D