Right, there are four different types of triangle ... an equilateral triangle. Three sides of equal length andall the angles are 60 degrees. This is a scalene triangle. All the sides are different ...

You'll be using Sketch 1 of this file which has three different types of triangles - scalene ... (typical responses: size, all triangles, all coloured, all have three sides, all pointed the same way ...

All triangles have internal angles that add up to 180°, no matter the type of triangle. Since you know that all angles in a triangle add up to 180°, you have to add up the values of the angles ...