MathDB

2007.1

Part of Indonesia Regional MO OSP SMA - geometry

Problems(1)

ABCD with equal sides (2007 Indonedia MO Province P2 q1 OSP)

Source:

12/11/2020
Let ABCDABCD be a quadrilateral with AB=BC=CD=DAAB = BC = CD = DA. (a) Prove that point A must be outside of triangle BCDBCD. (b) Prove that each pair of opposite sides on ABCDABCD is always parallel.
geometryparallelequal segments