Interior angles in a triangle add up to 180˚. Triangles close triangleA polygon with three straight sides. have three sides, therefore they have three angles. Interior angles in a triangle sum to a ...

Corresponding sides are proportional. This implies that the ratio of the length of side DE to side AB is equal to the ratio of the length of side EF to side BC, and also equal to the ratio of the ...

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

The Pythagorean theorem, a cornerstone of mathematics for millennia, provides a method for determining unknown sides in right-angled triangles using the formula a² + b² = c². Its applications extend ...

A regular polygon is a shape with at least three straight sides where all the sides are the same length and all the interior angles are equal. Knowing that a full turn is 360° and the angles in a ...

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 ...