Triangle: Area

How to find the area of a triangle (acute, right, obtuse): formula, 3 examples, and their solutions.

Formula

Formula

A = [1/2]bh

A: Area of a triangle
b: Base
h: Height

Example 1

Example

Solution

b = 6
h = 4

A = [1/2]⋅6⋅4

[1/2]⋅6 = 3

3⋅4 = 12

So 12 is the area of the given triangle.

Example 2

Example

Solution

b = 11
h = 5

A = [1/2]⋅11⋅5

11⋅5 = 55

So 55/2 is the area of the given triangle.

Example 3

Example

Solution

b = 8
h = 10

A = [1/2]⋅8⋅10

[1/2]⋅8 = 4

4⋅10 = 40

So 40 is the area of the given triangle.