area of a folded 12x18 rectangle (2018 Auckland MO S3)
Source:
December 31, 2020
geometrypaper foldingfoldingrectanglearea
Problem Statement
A rectangular sheet of paper whose dimensions are is folded along a diagonal, creating the -shaped region drawn in the picture (see below). Find the area of the shaded region.
https://cdn.artofproblemsolving.com/attachments/4/7/d82cde3e91ab83fa14cd6cefe9bba28462dde1.png