Year 11 maths · A.1 · Triangles
Pythagorean theorem: find a side
a² + b² = c², where c is the hypotenuse.
See worked examples
A right triangle has legs of 40 cm and 42 cm. How long is the hypotenuse?
Answer: 58 cm
A right triangle has a hypotenuse of 26 cm and one leg of 10 cm. How long is the other leg?
Answer: 24 cm
A right triangle has legs of 8 cm and 15 cm. How long is the hypotenuse?
Answer: 17 cm
Tip: a² + b² = c², where c is the hypotenuse.
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