
What is the circumference of this circle equal to?
C = 2(pi)r = (pi)d

What is the area of this circle?
A = (pi) r2

Find the area of this circle.
A = (pi)*36

Find the circumference of this circle.
C = 12(pi)

What is the arc measure, in degrees?
ao

What is the arc length?
arc length = a/360 (2)(pi)r = a/360 (pi)d

If AB = 12 and BC = 5, what equation can you use to find the diameter, d?
52 + 122 = d2

What is the correct equation to find x, if x is the length of AC?
52 + 82 = x2

What is the arc measure of the intercepted arc?
2xo

What is the measure of <a?
a = 1/2 (y - x)

Find x.
x = 60o

Find x.
x = 1/2 (80 - 20) = 1/2 (60) = 30

What is the correct equation to solve for a?
12a = 8(10)

What is the correct equation to solve for x ?
18(x + 18) = 16(16 + 24)

What is the equation for this circle?
(x - h)2 + (y - k)2 = r2

What is the equation for this circle?
(x - 4)2 + (y + 2)2 = 16