Verified Answer :

Panoyin

\(A = \frac{5}{2}t^{2} \sqrt{5 + 2 \sqrt{5} }\)

\(A = \frac{5}{2} (4)^{2} \sqrt{5 + 2(2.236067978)} }\)

\(A = \frac{5}{2} (16) \sqrt{5 + 4.472135956}\)

\(A = 40 \sqrt{9.472135956}\)

\(A = 40(3.077683537)\)

\(A = 123.1073415cm^{2}\)

Insidious


The area is 123.1073415 cm

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