U7: Basic Circles Re-Test Review

Find the circumference of the circle.

• 38.47 cm

• 10.99 cm

• 43.96 cm

• 21.98 cm

Tags

CCSS.7.G.B.4

• (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

What are the coordinates of the center and the radius of the circle with an equation:
(x + 7)² + (y - 6)² = 64 ?

• Centre (7,-6)
  Radius = 8 units
• Centre (-7,6)
  Radius = 64 units
• Centre (-7,6)
  Radius = 8 units
• Centre (7,-6)
  Radius = 64 units

Tags

CCSS.HSG.GPE.A.1

The point (-5,6) is on a circle with center (-1,3) write the equation of the circle

• (x+1)² + (y-3)²= 4000

• (x+5)² + (y-0)²= 25

• (x+1)² + (y-3)²= 25

• (x-1)² + (y+3)²= 25

Tags

CCSS.HSG.GPE.A.1

What is the equation of a circle with center (5,2) and circumference =  $20\pi$ ? 

•  $\left(x-5\right)^2+\left(y-2\right)^2=100$  

•  $\left(x-5\right)^2+\left(y-2\right)^2=400$  

•  $\left(x-5\right)^2+\left(y-2\right)^2=20$  

•  $\left(x-5\right)^2+\left(y-2\right)^2=10$  

What is the equation of a circle given its center is (-3,4) and is has area= $144\pi$  ?

•  $\left(x+3\right)^2+\left(y-4\right)^2=12$  

•  $\left(x+3\right)^2+\left(y-4\right)^2=144$  

•  $\left(x+3\right)^2+\left(y-4\right)^2=24$  

•  $\left(x+3\right)^2+\left(y-4\right)^2=6$  

What is the area of circle  $\left(x-1\right)^2+\left(y+4\right)^2=4$  ?

•  $A=2\pi$  

•  $A=16\pi$  

•  $A=4\pi$  

•  $A=\pi$  

Write the equation of a circle with center (7, 0) with radius . $3\sqrt{2}$  

•  $\left(x-7\right)^2+y^2=6$  

•  $\left(x-7\right)^2+y^2=18$  

•  $\left(x-7\right)^2+y^2=3\sqrt{2}$  

•  $\left(x-7\right)^2+y^2=36$  

Is the point (-3 , 5) inside, outside or on the circle with equation (x+2)² + (y-4)² = 9?

• Inside the Circle
• Outside the Circle
• On the Circle

Tags

CCSS.HSG.GPE.A.1

Write the equation of a circle with center (-2,-3) and tangent to y=4.

• $\left(x+2\right)^2+\left(y+3\right)^2=49$

• $\left(x+2\right)^2+\left(y+3\right)^2=7$

• $\left(x+2\right)^2+\left(y+3\right)^2=6$

• $\left(x+2\right)^2+\left(y+3\right)^2=36$