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1979 AMC 12 Question 3

AMC12 · 1979 AMC 12

Question 3

In the adjoining figure, $ABCD$ is a square, $ABE$ is an equilateral triangle and point $E$ is outside square $ABCD.$ What is the measure of $\angle AED$ in degrees?

Question illustration
  1. $10$
  2. $12.5$
  3. $15$
  4. $20$
  5. $25$