Right-Angled Triangles
A right-angled triangle has a single right angle. By definition,
that means that all sides cannot be the same length. A typical right-angled
triangle is shown below.
- The right angle is indicated by the little box in the corner.
- The other angle that we (usually) know is indicated by θ.
- The side opposite the right angle, which is the longest side, is called the hypotenuse.
- The side opposite θ is called the opposite.
- The side next to θ which is not the hypotenuse is called the adjacent.
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