Triangle Formulas

About Triangle Formulas

For two-dimensional shapes, there are two basic measurements which we need to find out which are area and perimeter of a given shape. Hence, the triangle has two basic formulas which help us to determine area and perimeter.

Perimeter of Triangle

The perimeter of triangle is the sum of all three sides of the triangle. Get the List of all Maths formulas in one place.

Let a,b, and c respectively be sides of a triangle then

Perimeter of Triangle formula = a + b + c

Classification of Triangle

Triangles can be divided on basis of their side length and angle. Now take a look at table given below which shows the difference between 6 different types of triangles on basis of angles and sides.

By Side By Angle

Triagle formulasThe equilateral Triangle has three equal sides

Triagle formulasIsosceles Triangle has two equal sides

Triagle formulasScalene Triangle has no equal sides

Triagle formulasAcute Triangle has three angles? 90°

Triagle formulasThe right Triangle has one angle = 90°

Triagle formulasObtuse Triangle has one angle > 90°

Area of Triangle

The area of a triangle is the space covered by the triangle. It is half multiplication of its base and altitude. It is given in square units. Observe triangle ABC given below which shows the base and height of a triangle which are used to evaluate the area of a triangle.

Area of triangle

Triagle formulas

Area of ΔABC = 1/2 x BC x AD

Here, BC is the base and AD is the height of the triangle.

Download a free pdf of Triangle Formula Its Use And Solved Examples

Triangle Formulas
Triangle Formulas

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