Question

Given : a²+b²+c² = a'²+b'²+c'²
Prove : a²=a'², b²=b'², c²=c'²
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Answer 1

It is not always true that if a²+b²+c² = a'²+b'²+c'² , then, a²=a'², b²=b'², c²=c'².

So, Mathematically, the question is invalid.

Answer 2

Answer:

Refer to the attachments