Answer:
[tex]≈
1223.65 {in}^{2} [/tex]
Step-by-step explanation:
[tex]surface area of a pyramid\\ = lw + l( \sqrt{ \frac{w}{2} ) ^{2} + {h}^{2} + w } \sqrt{ (\frac{l}{2}) ^{2} + {h}^{2} } \\ =
20
·
20
+
20
· \sqrt{ {( \frac{20}{2} )}^{2} + {18}^{2} + 20} \times \sqrt{ { (\frac{20}{2}) }^{2} + {18}^{2} } \\ ≈
1223.65041
[/tex]
hope this helps
brainliest appreciated
good luck! have a nice day!
