Shrinking Coin

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In this demonstration, learners attempt to get a large coin through a small hole, the size of a smaller coin. Use this activity to introduce learners to non-Euclidean geometry as the small 2D hole is stretched in 3D to produce a slit that is large enough to allow the larger coin through. Although this activity states that pounds are needed for the trick, you could easily substitute American coins. This activity guide includes a helpful video that demonstrates each step of the demo.

Quick Guide

Preparation Time:
Under 5 minutes
Learning Time:
5 to 10 minutes
Estimated Materials Cost:
1 cent - $1 per student
Age Range:
Ages 8 - adult
Resource Types:
Activity, Demonstration
Language:
English

Materials List (per student)

  • 1x 1p coin
  • 1x 2p coin
  • piece of paper (approx 10cm x 10 cm)
  • pencil
  • scissors

Keywords

Subjects

  • Mathematics
    • Geometry
      • Plane Geometry
      • Solid Geometry
  • The Nature of Science
    • The Scientific Process
      • Conducting Investigations

Audience

To use this activity, learners need to:

  • see
  • touch

Learning styles supported:

  • Involves hands-on or lab activities

Other

This resource is part of:

Access Rights:

  • Free access

By:

Rights:

  • All rights reserved, Institute of Physics,