To calculate the area of a triangle, you can use the formula:
\[ \text{Area} = \frac{1}{2} \times \text{base} \times \text{height} \]
In this case, the base of the triangle is 20 inches and the height is 6 inches. Plugging these values into the formula gives:
\[ \text{Area} = \frac{1}{2} \times 20 , \text{inches} \times 6 , \text{inches} \]
Calculating this:
\[ \text{Area} = \frac{1}{2} \times 120 , \text{square inches} = 60 , \text{square inches} \]
Therefore, the area of the triangle is 60 square inches.