Find the Area $45 \mathrm{ft}^{2}$ B) $36 \mathrm{ft}^{2}$ C) $23 \mathrm{ft}^{2}$ D) $90 \mathrm{ft}^{2}$

Find the area.
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A) $45 \mathrm{ft}^{2}$
B) $36 \mathrm{ft}^{2}$
C) $23 \mathrm{ft}^{2}$
D) $90 \mathrm{ft}^{2}$