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14 cards from this deck
a2+b2=c2a^2 + b^2 = c^2a2+b2=c2
The hypotenuse (longest side)
The two shorter sides
The longest side of a right-angled triangle
Opposite the right angle
c=a2+b2c = \sqrt{a^2 + b^2}c=a2+b2
a=c2−b2a = \sqrt{c^2 - b^2}a=c2−b2
When you know both shorter sides
When you know hypotenuse and one shorter side
13 cm
8 cm
Always the longest side
Pythagoras (or followers), around 600 BC
4.77 m (to 2 d.p.)
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