IKMC 2020 - Grades 11-12 - Brazil Second Application - Self-study Question 11

A gray square of area 36 cm² and a black square of area 25 cm² overlap as shown. A vertex of the black square lies on the gray lower side,2 cm from the lower-left corner. The black top side meets the gray right side 1 cm below the top. What is the perimeter of the white overlap?



Editorial note: the source tilt conflicts with the dimensions. Use the stated lengths and incidences; the solution shows valid parallel squares.