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sum of a areas, parts of regular octagon 2018 Malaysia OMK Intermediate A4

Source:

September 19, 2021
geometryoctagonareas

Problem Statement

Given a regular octagon ABCDEFGHABCDEFGH with side length 33. By drawing the four diagonals AFAF, BEBE, CHCH, and DGDG, the octagon is divided into a square, four triangles, and four rectangles. Find the sum of the areas of the square and the four triangles.
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