This gives the number of lines of symmetry of the triangle. Count how many ways the triangle will fit into its outline in a full turn (360°). This gives the order of rotational symmetry.

Three lines of symmetry on an equilateral triangle. Right-angled triangles follow the same rules as other triangles. It's not the right angle that matters but whether the triangle is scalene or ...

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 for equilateral, ...

Working with Sketch 5 Project Sketch 5 on the screen. Introduce the term scalene (pink triangle) and equilateral (outline). Have one student drag the scalene triangle to review its properties. Have ...