Question 61
In a convex quadrilateral $ABCD$ the sides $AB$, $BC$, $CD$ are equal. Also $AC = BD = AD$. How much is the angle in $D$?
MathNet 1997 — Part 01 Question 61
Math Olympiad Vault · MathNet 1997 — Part 01
Math Olympiad Vault · MathNet 1997 — Part 01