Solution
For this case we have a triangular prism and we want to find the volume so we can use this formula:
[tex]V=\frac{1}{2}B\cdot h[/tex]B= 12 cm^2 the base
h= 15 cm the height
Replacing we got:
[tex]V=\frac{1}{2}\cdot12cm^2\cdot15cm=90\operatorname{cm}^3[/tex]