Answer:
C. (1/2)h(h+3)
Step-by-step explanation:
If the height is h and the base is 3 more than the height, then the base is h+3.
The area of a triangle is given by the formula ...
A = (1/2)bh . . . . where b represents the base length and h represents the height
Substituting the values for height and base length given in this problem, we have ...
A = (1/2)(h+3)(h)
This expression for area is equivalent to ...
(1/2)h(h+3)
