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Pythagoras theorem states that in a right triangle
Aa^2 - b^2 = c^2 with c the hypotenuse
Ba + b = c for the three sides
Ca^2 + b^2 = c^2 with c the hypotenuse
Da^2 + b^2 = 2 c^2 with c the hypotenuse
Answer & Solution
Correct answer: C. a^2 + b^2 = c^2 with c the hypotenuse
1. a and b are the two legs and c is the hypotenuse.
2. The sum of squares of legs equals square of hypotenuse.
3. So a^2 + b^2 = c^2.
4. Hence option A is correct.
_Source: Selina Concise Mathematics Class 9, Ch on Pythagoras Theorem (Mistral OCR'd PDF), section on statement_
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