You can see the vertical side is much shorter than the other two sides, so that means that all the sides are different ... angles, each measuring 45º. This means this is an isosceles triangle ...

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 angles. Oh! Very clever! Now we have an equilateral ...

equal angles, and equal sides. You'll be using Sketches 5 and 6 of this file to explore which coloured triangles could fit into the given triangle outlines. The intent of these two sketches is to make ...

Big Idea – We can describe, measure, and compare spatial relationships. to build on students' knowledge of triangle and develop students' reasoning with properties of different classes of triangles to ...