Answer
h=8cm
Work Step by Step
Use the Area of a triangle formula $\frac{1}{2}$bh to solve this problem.
Plug in the given values. The problem reveals that A is equal to 28 and b is 7. When you plug in these values, your new equation is:
28=$\frac{1}{2}$(7)h
The whole purpose of this is to solve for h, which represents the height. Notice that on the right side, $\frac{1}{2}$ can be distributed to the 7 in the parentheses, giving you a more simplified equation:
28=3.5h
Lastly, divide both sides by 3.5 to get h by itself:
8=h.
