Circle Review

What is the equation of a circle centered at (-2,5) and a radius of 9

• (x-2)²⁺(y+5)²=81
• (x+2)²⁺(y-5)²=81
• (x-2)²⁺(y+5)²=9
• (x+2)²+(y-5)²=9

Tags

CCSS.HSG.GPE.A.1

Write the equation of the circle with a radius of 3 and a center of (4, 2). 

• ( x - 4)² + (y - 2)² = 3
• ( x - 2)² + (y - 2)² = 3²
• ( x - 4)² + (y - 2)² = 3²
• ( x + 4)² + (y + 2)² = 3²

What is the radius?

• 18
• 72
• 38
• 14

Tags

CCSS.7.G.B.4

In the equation (x+2)²+(y+3)²=49, the center of the circle is at....

• (2, 3)
• (3, 2)
• (-3, -2)
• (-2, -3)

In the equation (x-3)²+(y-2)²=16, the radius of the circle is...

• 16
• 32
• 3
• 4

What is the equation of the circle, with centre (a,b) and radius r units?

• (x - a)² + (y - b)² = r² 
• (x + a)² + (y + b)² = r
• (x - a)² + (y - b)² = r
• (x + a)² + (y + b)² = r² 

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

• (-9/2, -1)
• (-15/2, -6)
• (9/2, 1)
• (15/2, 6)

Tags

CCSS.HSG.GPE.B.6

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

• (x+5)²+(y-6)²=25
• (x-5)²+(y-2)²=25
• (x+1)²+(y-3)²=25
• (x-1)²+(y+3)²=25

Tags

CCSS.HSG.GPE.A.1

Which point lies on the circle with a center at (2,0) and a diameter of 8?

• (1,-3)
• (2,-8)
• (2,-4)
• (-1,-3)

Tags

CCSS.HSG.GPE.A.1

What is the equation for the circle shown?

• (x+2)² + (y-6)² = 25
• (x-2)² + (y+6)² = 5
• (x+2) + (y-6) = 25

Tags

CCSS.HSG.GPE.A.1