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 ...

Save guides, add subjects and pick up where you left off with your BBC account. A triangle is a polygon. It is a closed 3-sided shape made up of straight lines. The ‘tri-’ part of the word ...

First, here's an isosceles triangle, it has two equal length sides and two equal angles. Oh! Very clever! Now we have an equilateral triangle. Three sides of equal length andall the angles are 60 ...