Answer:
60 cm^2
Explanation:
The formula for the area of a triangle is ...
A = (1/2)bh
where b is the length of the base, and h is the height. Your triangle shows a base length of 12 cm + 3 cm = 15 cm, and a height of 8 cm. Using these values in the formula, we have ...
A = (1/2)(15 cm)(8 cm) = 60 cm^2