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Use Pythagoras' Theorem : In a right angled triangle the square of the hypotenuse is equal to the sum of the squares of the other two sides.

Let H be the hypotenuse then :-

H2 = 152 + 82 = 225 + 64 = 289

Then H = √289 = 17cm

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Q: How do you find the length of the hypotenuse if the base is 15cm and the height is 8cm?
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