Answer:It looks like your first one says 7 cm/h 8 cm/b, which I’m guessing means:h = height = 7 cmb = base = 8 cmIf that’s right, and you’re finding the area of a triangle, the formula is:\text{Area} = \frac{1}{2} \times b \times h\text{Area} = \frac12 \times 8 \times 7 = 28 \ \text{cm}^2