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Using the Pythagorean theorem, we can represent the side BC as

squared 4 + squared 4
2^2+2^2
Squared 2^2 +2^2

2^2.

Or (for the second one)

2 squared 2
8
4
4 squared 2

Which is [a rational number] or [irrational number]

Using the Pythagorean theorem we can represent the side BC as squared 4 squared 4 2222 Squared 22 22 22 Or for the second one 2 squared 2 8 4 4 squared 2 Which class=