The formula for the area of a triangle is area= \(\frac{1}{2} base*height\) . So when you plug in the given values: Area= \(\frac{1}{2} *15 \frac{1}{4}*18\) . When you convert all the numbers to fractions: Area= \(\frac{1}{2} * \frac{61}{4} * \frac{18}{1}\) . You multiply across the numerators and divide by the product of the denominators and get 137.25 \(inches^{2}\).
