Given your knowledge of the formula for the area of a triangle:
1) CREATE a formula for height (h) and
2) Find the height of a triangle with a base of 8.4" and an area of 29.82 sq.".
... or A = 1/2 bh
Let's create a formula for height (h), given the base and area. Simply, solve for h!
A = 1/2 bh << multiply both sides by 2 >>
2A = bh << divide both sides by b >>
h = 2A/b
h = 2(29.82)/8.4 = 59.64/8.4 = 7.1"