Two dimensional reasoning

This collection contains resources from the website 1001mathproblems.com by Sian Zelbo. The focus is on two dimensional reasoning in the form of puzzles. 

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The falling origami papers problem

Eight pieces of origami paper are shown after they have fallen on the floor. The challenge is to establish the order in which the papers fell on the floor.

Taxicab geometry

Two friends, Albert and Betty, agree to meet for lunch. Their starting locations and possible meeting point are shown on a grid. Students are asked to explore the best place for the two friends to meet, given certain conditions (e.g. only four blocks away from Albert). There are six challenges to attempt with...

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