Circle Equations

What is the center and radius for a circle with the equation:
(x-4)²+(y+2)²=25

• C:(4, -2), r=5
• C:(-4, 2), r=5
• C:(4, -2), r=25
• C:(-4, 2), r=25

State the center and the radius:
(x+4)²+y²=36 
Use Desmos.com to graph the circle, take a screen shot and email your teacher the image.  

• C: (-4, 0), r=6
• C: (4, 0), r=6
• C: (0, -4), r=6
• C: (0, 4), r=6

In the equation (x+2)²+(y-3)²=4, the radius of the circle is...

• 4
• 2
• 3
• 16

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

Tags

CCSS.HSG.GPE.A.1

What is the center and radius for a circle with the equation:
(x-4)²+(y+2)²=25

• C:(4, -2), r=5
• C:(-4, 2), r=5
• C:(4, -2), r=25
• C:(-4, 2), r=25

Find the center if the endpoints of the diameter are at (-12, -7) and (3, 5).

• (-4.5, -1)
• (-7.5, -6)
• (4.5, 1)
• (7.5, 6)

Tags

CCSS.HSG.GPE.A.1

Find the radius if the endpoints of the diameter are (-6, 5) and (-2, -3).

• 5.52
• 11.05
• 4.47
• 8.94

Tags

CCSS.HSG.GPE.A.1

What is the center of the circle with equation x² + y² = 1?

• (1, 1)
• (0, 0)
• not enough information

• Secant
• Diameter
• Tangent
• Chord

• Secant
• Diameter
• Radius
• Chord