Grades 5-6 Video Solutions 2021-video 2021 5-6/9

Video Transcription

Video Summary

Mary folded a piece of paper twice, ending up with an isosceles right triangle. The problem explores which original shape the paper could have been: P, Q, or R. A right triangle can be formed by folding a square diagonally or a larger right triangle along its axis of symmetry. Shape P can be folded to form a square, then a right triangle. Shape Q can be folded diagonally then symmetrically to form a right triangle. Shape R also folds into a right triangle through its axis of symmetry. Thus, the original shape could be P, Q, or R.

Keywords

paper folding

isosceles right triangle

original shape

symmetry

folding problem