### Types of Triangles

## Types of Triangles

You’ve decided to by a watch and the watch seller asks you what sort of specialties you want to the watch to have in order to help you. For example, there are plastic, metal, leather strapped watched and alarm clocks. We can here speak about some similar characteristics between the watches.

When you speak of triangles, not all triangles are the same. Some triangles have special properties; some have the same lengths for each of their sides, some of the angles within the triangle etc.

## Types of triangles based on sides

### Scalene/unequal triangle:

The lengths are of various sizes – so this is used for triangles where all of the lengths of the sides are different..

### Isosceles triangle

A triangle where 2 sides of the triangle are of equal length. Think of it like ‘twins’.

### Equilateral triangle

A triangle where all sides are of equal length.

## Types of triangles based on angles

### Acute angled triangle:

Triangles where all angles less than 90°.### Right angled triangle :

Triangles where one angle is 90°. The other angles must be less than 90° .

### Obtuse angled triangle:

Triangles where one angle is larger than 90°; so the other angles must be less than 90°.

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