Triangle: Area
How to find the area of a triangle (acute, right, obtuse): formula, 3 examples, and their solutions.
Formula
A = [1/2]bh
A: Area of a triangle
b: Base
h: Height
Exampleb = 6, h = 4, A = ?
Solution
Solution (Detail)
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.
Exampleb = 11, h = 5, A = ?
Solution
Solution (Detail)
b = 11
h = 5
A = [1/2]⋅11⋅5
11⋅5 = 55
So 55/2 is the area of the given triangle.
Exampleb = 8, h = 10, A = ?
Solution
Solution (Detail)
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.