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

Area of a triangle

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)

Area of a Right Angled Triangle

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

Area of an Equilateral Triangle

4. Area of an Isosceles Triangle

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: $s = \frac{1}{2}\left( {a + b + c} \right)$

Area of Triangle with Three Sides

6. How to find the area of a triangle with 2 sides and 1 angle

area of a triangle with 2 sides and 1 angle