D is the answer to your question
Answer:
A. a testable statement that is capable of being supported or refuted by scientific evidence
Explanation:
Py·thag·o·re·an the·o·rem
/pəˌTHaɡəˈrēən,pī-/
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noun
a theorem attributed to Pythagoras that the square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides.