Circle Equation Review

What represents the center of the circle?

• (h,k)

• (k,h)

• (x,y)

• (y,x)

Tags

CCSS.HSG.GPE.A.1

What does $r^2$ represent?

• center

• radius times two

• radius squared

• cirfumerfence

Tags

CCSS.7.G.B.4

What is the center of the following circle? $\left(x-3\right)^2+\left(y+4\right)^2=64$  

• (-3, 4)

• (3, 4)

• (3, -4)

• (-3, -4)

Tags

CCSS.HSG.GPE.A.1

What is the radius of the following circle? $\left(x-3\right)^2+\left(y+4\right)^2=64$  

• 6

• 8

• 4

• 16

Tags

CCSS.HSG.GPE.A.1

What is the circumference of the following circle? Round to the nearest tenth.

 $\left(x-3\right)^2+\left(y+4\right)^2=64$  

• 50.3

• 36

• 100.5

• 18.8

Tags

CCSS.7.G.B.4

What is the area of the following circle? Round to the nearest tenth.

 $\left(x-3\right)^2+\left(y+4\right)^2=64$  

• 201.1

• 452.4

• 50.3

• 113.1

Tags

CCSS.7.G.B.4

What is the equation for a circle with center (5, -6) and radius of 7?

•  $\left(x-5\right)^2+\left(y+6\right)^2=49$  

•  $\left(x+5\right)^2+\left(y-6\right)^2=49$  

•  $\left(x-5\right)^{ }+\left(y+6\right)^{ }=49$  

•  $\left(x+5\right)^{ }+\left(y-6\right)^{ }=49$  =

Tags

CCSS.HSG.GPE.A.1

What is the radius of a circle with diameter 22?

• 22

• 11

• 44

Tags

CCSS.7.G.B.4

What is the radius of a circle with area $144\pi$  ?

• 144

• 28

• 24

• 12

Tags

CCSS.7.G.B.4

What is 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

Tags

CCSS.HSG.GPE.A.1