Folding and Symmetry

Today we continue learning about symmetry. Especially we learned how to solve folding problems. In order to find out the shape after folding and cutting, one common strategy is to draw the image as you unfold it using the mirror image method.

Homework

1. A square is folded 3 times into a triangle as shown below. Before folding and cutting using paper and sissor, try to draw how image look like when unfolding using the mirror image method.

2. This problem is an example of a classic folding puzzle. Take a piece of blank paper.  Divide it into 8 sections and label each section with a number from 1 to 8, as shown below. Fold this paper along the lines so that the numbers lie on top of each other in order from 1 to 8.