MathEd

Mathematics Education for Everybody

For Jacki

What are surds?

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Manipulating surds

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Approximating surds

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Surds

What are surds? Manipulating surds Approximating surds

Polygons

Angles in a triangle Angles of a polygon Polygons on right-angled triangles Pythagoras’ theorem

Pythagorean Triples – fun stuff

Return to Pythagorean Triples menu The first Pythagorean triple is 3-4-5. But did you know – and can you prove – that every Pythagorean triple has an element that is divisible by 3, an element that is divisible by 4, and an element that is divisible by 5?

Pythagorean Triples – Complex number method

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Pythagoras’ Theorem – proof

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Pythagoras’ Theorem – form a hypothesis

Return to Pythagoras’ Theorem menu Forming a hypothesis Play with this right angled triangle. What is the relationship between the side lengths in right angled triangles? Note that side c is the hypotenuse (the side opposite the right angle). This only works for right angled triangles, as you can see here.