Angles, standard form, and radians
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330
11π/6
120
2pi/3
135
3pi/4
270
3π/2
240
4π/3
300
5π/3
225
5π/4
150
5π/6
315
7π/4
210
7π/6
Area formula
A=0.5r^2 • theta
coterminal angles
Angles that have the same terminal side
Circumference Formula
C=2πr
180
π
0
0
Arc formula
S= r • theta, theta is measured in radians
Vertex
The common endpoint of an angle
An angle in standard position has
Vertex is at (0,0) and initial side is on x-axis
Radian
a unit of angle measure based on arc length
90
pi/2
60
pi/3
45
pi/4
30
pi/6
Initial side
the fixed ray of an angle
Terminal side
the position of the ray after rotation