1

Part of 2020 Ukrainian Geometry Olympiad - December

Problems(1)

angle chasing in a quadrialteral with 3 equal sides, 90^o, 150^o

Source: December 2020 Ukraine Geometry Olympiad VIII p1, IX p1

The three sides of the quadrilateral are equal, the angles between them are equal, respectively

90^o

150^o

. Find the smallest angle of this quadrilateral in degrees.

anglesgeometryequal sides