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10 cards from this deck
Angle a line makes with positive x-axis, measured anticlockwise
0°0°0° to 180°180°180°
m=tanθm = \tan \thetam=tanθ
90°90°90°
Undefined
0°0°0°
000
Obtuse (greater than 90°90°90°)
Add 180°180°180° to the reference angle
DEG (degrees mode)
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