The shortest side of a triangle is opposite the smallest angle. Image caption, All three sides of an equilateral triangle are the same length. The word equilateral means equal lines. Each angle is ...

The ancient Greek mathematician Euclid proved in his Elements of Geometry that there are only five Platonic solids – the regular tetrahedron (four sides that are equilateral triangles), the cube (six ...

They often identify them solely based on their resemblance to prototypes: e.g., a shape will be called a triangle if it looks like an equilateral triangle with ... and shapes with or without straight ...

and equal sides. You'll be using Sketch 1 of this file which has three different types of triangles - scalene, isosceles, equilateral. Each triangle type has a different colour (pink for scalene, red ...