Circles [pre-quiz prep]

Determine the equation of the circle in standard form:
x² + y² + 4x + 6y - 36 = 0

• (x+2)² + (y+3)² = 49
• (x+2)² + (y+3)² = 13
• (x-2)² + (y-3)² = 49
• (x-2)² + (y-3)² = 13

Determine the equation of a circle with center (5,-3) and radius of 9

• (x+5)² + (y-3)² = 9

• (x-5)² + (y+3)² = 9

• (x-5)² + (y+3)² = 81

• x²+y²-5x+3y-81=0

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

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

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

• 4
• 2
• 3
• 16

What is the part of the circle called that is shown in red?

• quadrant

• semi-circle

• sector

• chord

What circle definition is shown in red?

• radius

• secant

• diameter

• segment

What definition describes the segment shown in red?

• secant

• can't see

• segment

• tangent

What is this called?

• Tangent Line

• Secant

• Chord

• Diameter

How many degrees are in a semicircle?

• 90
• 180
• 270
• 360

Give an example of a chord

• JL

• KL

• GH

• JK