Trigonometry can be used to find the length of a side in a triangle. Trigonometry close trigonometryThe study of sides and angles in triangles. can be used to find a missing side in a right-angled ...

Once similarity is established, the real fun begins: using proportions to find unknown lengths. The principle is simple: ...

A triangle is a polygon. It is a closed 3-sided shape made up of straight lines. The ‘tri-’ part of the word triangle means three. A triangle has 3 sides and 3 angles. Interior angles are the angles ...

Forgetting Units: Always include the correct units in your final answer. Failing to do so can result in a loss of points. Now ...