Circle Parts
A line from the center of the circle to the edge
Radius
Identify the measure of angle K
59 degrees
What is the standard form for the equation of a circle
(X-h)2 + (y -k)2 = r2
A line from one side of the circle to the other side, that goes through the center
Diameter
Identify the measure of angle L
91 degrees
Equation for finding a diameter
d=2r
A section of the outside of the circle
Arc
Identify the measure of angle M
30 degrees
Equation for finding the radius of a circle
d/2=r
The distance around the outside of the circle
Circumference
What are the lengths of the sides of the triangle from smallest to largest
Small: Side KL
Middle: Side LM
Large: Side KM
Identify the center and radius of the circle for the following equation:
(x-5)2 + (y-1)2 =64
Center: C (5, 1)
Radius: R =8
A line that touches the circle at exactly one point
Tangent
Identify the center and radius of the circle for the following equation:
(x+6)2 + (y+5)2 =16
Center: C (-6, -5)
Radius: R=4