So, what's with the biscuits? Oh a triangulator machine! Very cool! Right, there are four different types of triangle. First, here's an isosceles triangle, it has two equal length sides and two equal ...

Trigonometry close trigonometryThe study of sides and angles in triangles. can be used to find a missing angle in a right-angled triangle when two sides are known. An understanding of the three ...

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

Step 1: Draw a Right Angle. Begin by drawing a right angle. This establishes the basic structure of your right triangle. Step ...