Answer:
The Correct answer is A
Explanation:
b) because r²=q²+p²,p²=r²-q² not
r²+q²
c) (p+q)²=r²
is not correct because
(p+q)²=(p+q)(p+q)
d) p²+r²=q² wrong
because
q²=r²-p²
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