2021 AMC 10B Problems/Problem 21
Problem
[url=https://aops.com/community/p20334805][size=150][b]Problem 21[/b][/size][/url] A square piece of paper has side length and vertices and in that order. As shown in the figure, the paper is folded so that vertex meets edge at point , and edge at point . Suppose that . What is the perimeter of triangle
Solution
A