# TRIANGLES

CONTENT

1. Triangle and its types
2. Inscribed and circumscribed circles in a given triangle

## Triangle and its Types

A triangle is a plane figure bounded by three straight lines. The figure below shows the typical shape of a triangle. The sum total of all the angles in a triangle is 180o. Triangles are described by

1. the lengths of their sides
2. the sizes of their angle; and
3. a combination of both lengths of sides and sizes of angles

## Types of Triangle

1. Right angled triangle: A right-angled triangle has one angle equal to 90o. The side opposite the 90o is called the hypotenuse.

2. Equilateral triangle: An equilateral triangle has all the three sides and angles equal.

3. Isosceles triangle: An Isosceles triangle has two equal sides and angles.

4. Scalene triangles: – a scalene triangle has three unequal sides and angles.

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