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**Related topic**

Investigate Pythagorasâ€™ Theorem and its application to solving simple problems involving right angled triangles (ACMMG222)

- understanding that Pythagoras' Theorem is a useful tool in determining unknown lengths in right-angled triangles and has widespread applications
- recognising that right-angled triangle calculations may generate results that can be integers, fractions or irrational numbers

Pythagoras theorem