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Triangles. Love them or hate them, you can’t escape them, and they come in all sorts of varieties. Are all triangles the same? One thing is the same – they have three sides and are polygons, which means the sides are straight lines. What can be different about them? They can be different sizes, the sides can be different lengths, the angles can be different. There are 4 bits of key vocabulary we need to know about them.





Sounds complicated, but have a watch of this clip and the differences become clear;

Once you’ve done that, log on Mathletics for “Triangle Tasters” where you’ll identify different types of triangle. If the sides have a little line through them, that’s Mathletics helping you out by telling you that they’re the same length, very useful for spotting isosceles and equilateral triangles, wink wink.