The base of this regular right pyramid is a square. What is its surface area?

Answer:
○ A) 21 ft.²
Step-by-step explanation:
[tex] {a}^{2} + 2a \sqrt{ \frac{ {a}^{2}}{4} + {h}^{2} } = S. A. \\ \\ {3}^{2} + 2(3) \sqrt{ \frac{ {3}^{2} }{4} + {2}^{2}} = 24 \\ \\ 24 ≈ 21[/tex]
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