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IMSO 2021 Mathematics - International Short Answer Question 2

IMSO Maths · IMSO 2021 Mathematics - International Short Answer

Question 2

Points $A$, $B$, and $C$ are on a straight line such that $AB=AC=1$. Square $ABDE$ and equilateral triangle $ACF$ are drawn on the same side of line $BC$, and lines $EC$ and $BF$ intersect at $G$. What is the measure, in degrees, of angle $EGB$?

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