Circles Part I Review

Write the equation of a circle with center (7, 0) with radius 3. 

• (x - ^7)^2 + y^2 = 9
• x^2 + (y -7)^2 = 9
• (x - 7)^2 + y^2 = 3
• x^2 + (y -7)^2 = 3

Write the equation at the origin with radius 6.  

• x^2 + y^2 = 6
• x^2 + y^2 = 36
• x  + y = 6
• x + y = 36

Write the equation of a circle with center (h,k) and radius r.

• x^2 + y^2  = r^2
• (x + h)^2 +  (y + h)^2 = r^2
• (x - h)^2 + (y - k)^2 = r^2
• (x - h)^2 - (h - k)^2 = r

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

• 4
• 2
• 3
• 16

The distance across the circle through the center is called the...

• radius
• diameter
• circumference
• area

The distance all the way around the circle is called the...

• radius
• diameter
• circumference
• area

AD and CG are diameters of Circle B, how would you classify arc GCF?

• Minor Arc

• Major arc

• Semi-Circle

• Full circle

What is 11π/6 radians in degrees? 

• 30
• 330
• 360
•  300

What is 2π/3 radians in degrees? 

• 150
• 120
• 180
•  30

What is 225  degrees in radians? 

• 7π/4
• 5π/4
• 3π/4
• 5π/3