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1972 AMC 12 Question 35

AMC12 · 1972 AMC 12

Question 35

Equilateral triangle $ABP$ with side $AB$ of length $2$ inches is placed inside square $AXYZ$ with side of length $4$ inches so that $B$ is on side $AX.$ The triangle is rotated clockwise about $B,$ then $P,$ and so on along the sides of the square until $P,$ $A,$ and $B$ all return to their original positions. The length of the path in inches traversed by vertex $P$ is equal to:

Question illustration
  1. $\dfrac{20\pi}{3}$
  2. $\dfrac{32\pi}{3}$
  3. $12\pi$
  4. $\dfrac{40\pi}{3}$
  5. $15\pi$