Circle Cheat Sheet Vocabulary: Label each special segment/line on the given circles Radius Diameter Chord
O
Secant Tangent Point of tangency
O
Tangents: Identify each special relationship on each diagram
O
O
Angles: For each angle, do the following:
(a) Name the type of angle labeled with an x (b) Write the formula that you would use to solve for x
(a) (b)
(a) (b)
(a) (b)
(a) (b)
bax
x ab
x ab
(a) an angle formed by … (b)
(a) an angle formed by … (b)
(a) an angle formed by … (b)
Polygons: For each of the inscribed polygons, illustrate the special angle values.
Segments: For each segment length, do the following: (a) Name how the segments are formed
(b) Write the formula that you would use to solve for one of the missing lengths
y
x
b
a
(a) a segment formed by … (b)
b
a
y
x
(a) a segment formed by … (b)
ba
x
(a) a segment formed by … (b)
Distance: Label each length in the given diagram and write an equation Circles - diameter - radius - distance from the center to the chord - chord length
Spheres - radius of the sphere - radius of the circle - distance from the center to the plane (cross-section)
