Area of a Triangle Formula

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A triangle is a closed geometric figure which has 3 sides joined together. Depending on the length of its sides

and the measure of its angles, a triangle can be classified into different types of triangles like the equilateral

triangle, right angled triangle etc. Area of a triangle is the region covered inside the triangle when it is

bounded by its sides.


Example 1: Calculate the area of the triangle if the length of the base is 30m and height of the

triangle is 45m.



Given the length of a side = base length, b = 30m

The perpendicular drawn to a side from a vertex is the ‘height’ of the triangle.

Given the height of the triangle, h = 45m

Area of the triangle formula, A = 1/2 * (base length) * (height)

Area, A = 1/2 * (30m) * (45m) = 1/2 * (1350m2) = 675m2

Area of the given triangle, A = 675m2

 
Example 2: Calculate the area of the triangle if the length of the base is 15m and height of the

triangle is 19m


Given the length of a side = base length, b = 15m

The perpendicular drawn to a side from a vertex is the ‘height’ of the triangle.

Given the height of the triangle, h = 19m

Area of the triangle formula, A = 1/2 * (base length) * (height)

Area, A = 1/2 * (15m) * (19m) = 1/2 * (285m2) = 142.5m2

Area of the given triangle, A = 142.5m2


 
 
 

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