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

User Rob Grzywinski
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1 Answer

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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}

User Jerusha
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