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1967 AMC 12 Question 11

AMC12 · 1967 AMC 12

Question 11

If the perimeter of rectangle $ABCD$ is $20$ inches, the least value of diagonal $AC,$ in inches, is:
  1. $0$
  2. $\sqrt{50}$
  3. $10$
  4. $\sqrt{200}$
  5. none of these