## Base and Height

The first equation that can be used is when the base and height are known, see Figure 13.9.

This is the easiest equation to use when calculating the area of a triangle, but it is difficult to collect the required dimensions. The difficulty is determining the intersection of the height with the base line. If the triangle is equilateral (A), or an isosceles triangle, the problem is not as difficult because the intersection is one half of the distance of the base line. When the triangle is not an equilateral triangle, the intersection is much more difficult to determine. The equation is:

where A = Area; b = Length of base; h = Height perpendicular to base.

Problem: What is the area of a triangle (ac) with a base 150.0 ft long and a height of 100.0 ft.

Solution:

1 ac acre

43,560 ft2

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