Resources tagged with Proof by contradiction similar to The Square Hole:
Other tags that relate to The Square Hole
Vector Notation and Geometry. Rational and irrational numbers. Cosine rule. Mathematical reasoning & proof. Triangles. Continued fractions. Regular polygons and circles. Properties of numbers. Proof by contradiction. Tessellations.There are 3 results
Broad Topics > Using, Applying and Reasoning about Mathematics > Proof by contradiction
An Introduction to Proof by Contradiction
Age 14 to 18
An introduction to proof by contradiction, a powerful method of mathematical proof.
The Dangerous Ratio
Age 11 to 14
This article for pupils and teachers looks at a number that even the great mathematician, Pythagoras, found terrifying.
Proximity
Age 14 to 16 Challenge Level:
We are given a regular icosahedron having three red vertices. Show that it has a vertex that has at least two red neighbours.
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NRICH is part of the family of activities in the Millennium Mathematics Project.
NRICH is part of the family of activities in the Millennium Mathematics Project.