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education/math/MATH1060 (trig)/Angles.md
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@ -19,7 +19,14 @@ A **supplementary** angle is formed when two positive angles add up to $180\degr
Angles greater than $90\degree$ have no complement and angles greater than $180\degree$ have no supplement.
# Right Angle Triangle Trigonometry
# Triangles
Triangles are typically notated using $A$, $B$, and $C$ for the angles of a triangle, and $a$, $b$, and $c$ for the sides of a triangle. $C$ will always be the right angle, and $c$ will always refer to the hypotenuse, but $A$/$a$ and $B$/$b$ are used interchangeably.
For any valid triangle, all three angles will *always* add up to $180\degree$.
$$ \angle A + \angle B + \angle C = 180 $$
## Right Angle Triangle Trigonometry
| SohCahToa | Inverse |
| --------------------------------------------- | --------------------------------------------- |