# How to find the area of a triangle

This article will show you how to calculate the area of ​​a triangle

## 1. The area of the triangle is given by the formula mentioned below

Formula: A = 1/2 × base x perpendicular height Example: What is the area of a triangle with base BC = 5 cm and height AH = 6 cm?

Using the formula

Area of a Triangle, A = 1/2 × BC × AH = 1/2 × 5 × 6 = 15 cm2.

## 2. Area of a Right Angled Triangle

Formula: A = 1/2 × base x height (Perpendicular distance) Example: What is the area of a triangle with base BC = 4 cm and height AC = 5 cm?

Using the formula

Area of a Triangle, A = 1/2 × BC × AH

AH = AC => A = 1/2 × BC × AC = 1/2 × 4 × 5 = 10 cm2.

## 3. Area of an Equilateral Triangle ## 4. Area of an Isosceles Triangle ## 5. Area of Triangle with Three Sides (Heron’s Formula)

The perimeter of a triangle: P = (a + b + c)

Semi-perimeter of the triangle: $s = \frac{1}{2}\left( {a + b + c} \right)$ ## 6. How to find the area of a triangle with 2 sides and 1 angle 