Pythagoras’ theorem
noun/paɪˌθæɡərəsɪz ˈθɪərəm/
/pəˌθæɡərəsɪz ˈθiːərəm/, /pəˌθæɡərəsɪz ˈθɪrəm/
(North American English Pythagorean theorem
(geometry)/paɪˌθæɡəˌriːən ˈθɪərəm/
/pəˌθæɡəˌriːən ˈθiːərəm/, /pəˌθæɡəˌriːən ˈθɪrəm/
)- the rule that, in a right-angled triangle, the square of the hypotenuse (= the side opposite the right angle) is equal to the squares of the other two sides added together
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Pythagoras’ theorem