Unit Test Circles

Write the equation of the circle.

• (x+1)² + (y +1)² = 3
• (x+1)² + (y -1)² = 3
• (x+1)² + (y +1)² = 9
• (x-1)² + (y -1)² = 9

In the equation (x-4)²+(x-3)²=25, the radius is

• 4
• 3
• 5
• 25

The distance around a circle

• Diameter
• Radius
• Circumference
• Area

What is the equation for this circle?

• (x+1)+(y+1)=9
• x²+y²=9
• x+y=9

What is the center of the circle with this equation is (x+2)²+(y-4)²=41?

• (2,-5)
• (-2,4)
• (2,-4)
• (-2, -4)

Find the arc length of the bolded arc.

• A

• B

• C

• D

Find the arc length.  Leave your answer in terms of π.

• 7/4π
• 7/2π
• 1/8π
• 45π

Find the area of the circle below.

• 8.76 cm²

• 18.52 cm²

• 21.90 cm²

• 28.26 cm²

What is the area of the shaded SECTOR? Round to the nearest hundredth.

• 9.42 u²

• 113.10 u²

• 284.3 u²

• 452.39 u²

If Pacman's mouth is open to 70° and the radius of his mouth is 8mm, what is CENTRAL ANGLE MEASURE of his Body?

• 290^o

• 270^o

• 180^o

• 110^o