Formula for finding the area of a triangle: [tex]A = \frac{1}{2}bh[/tex]
Where b is the base and h is the height.
Substitute the variables for the values.
[tex]A = \frac{1}{2}(30)(18)[/tex]
[tex]A = \frac{1}{2}540[/tex]
A = 270
So, the area is 270 square centimeters.