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an isosceles triangle's 2 sides are equal
now, the other side is (hypotenuse) is 4√2 cm
the Pythagoras theorem is: (hyp)² = adj² + opp²
now, adj and opp are equal, so:
(4√2)² = 2adj²
32 = 2adj²
16= adj²
adj= 4 cm
since adj= opp, then opp= 4 cm
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