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area of octagon, in a square 2021 Malaysia IMONST 1 Senior P16

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September 22, 2021
geometryoctagonareassquare

Problem Statement

Given a square ABCDABCD with side length 66. We draw line segments from the midpoints of each side to the vertices on the opposite side. For example, we draw line segments from the midpoint of side ABAB to vertices CC and DD. The eight resulting line segments together bound an octagon inside the square. What is the area of this octagon?