Find the Perimeter or Circumference $\pi \approx 3.14$ When Needed $312.5 \mathrm{yd}$

Multiple Choice

Find the perimeter or circumference. Use $\pi \approx 3.14$ when needed.
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Equilateral triangle

A) $312.5 \mathrm{yd}$
B) $74 \mathrm{yd}$
C) $50 \mathrm{yd}$
D) $75 \mathrm{yd}$