Question

3. What is the surface area of this triangular prism? 15 in. 12 in 21 in. 18 in. 2 A 846 in.

Answer 1

The surface area can be calculated below

`\text{surface area=}bh+2ls+lb`
`\begin{gathered} \text{surface area=(}18*12\text{)}+2(21*15)+(21*18) \\ \text{surface area=}216+630+378 \\ \text{surface area=}1224inches^2 \end{gathered}`