Hi! I'm Triggy

My name is Triggy and I'm an acute angled scalene triange. You may not know what that means, but that's okay. That's what I'm here for-to teach you everything you need to know about triangles.

A triangle is technically a 3 sided 2 dimensional figure. Triangles with equal sides (equilateral triangles) are very useful in building because they are a very sturdy shape. This is why the Eiffel Tower was made using triangles. They're very useful in maths, because it is easy to calculate the sides and angles of triangles without many measurements-if you know the right formulae that is.

There are many different types of triangles. Triangles are catagorised by the largest angle and whether the sides are the same size.




This triangle is equilateral. It is called equilateral because its sides are all equal.

This triangle is scalene because none of its sides are the same length
This is an isoceles triangle because two of the sides are the same.

This is a right angled triangle because it has a right angle of 90 degrees

This is an obtuse angled triangle because the largest angle is obtuse

This is an acute angled triangle because the smallest angle is acute.

Every triangle can be catagorised by both its side length and largest angle size, though certain combinations are not possible, such as an equilateral obtuse angled triangle. If all the sides of a triangle are the same length, all the angles are equal too. The interior angles of a triangle add up to 180 degrees. When you divide this by 3 you're left with 60 degrees for each angle, therefore no angles are obtuse. But you'll learn more about those sorts of things on the other pages.

So have a browse of the site. You might find out some interesting things. Have fun!