MathDB
isosceles trapezoid wanted when all polygons are regular

Source: 2023 IGO Elementary P1

January 18, 2024
geometrytrapezoidisosceles

Problem Statement

All of the polygons in the figure below are regular. Prove that ABCDABCD is an isosceles trapezoid. https://cdn.artofproblemsolving.com/attachments/e/a/3f4de32becf4a90bf0f0b002fb4d8e724e8844.png
Proposed by Mahdi Etesamifard - Iran