1. ABC is a triangle, right angled at C. If AB =25 cm and AC = 7cm.Find the length of BC.
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By phythagorean triplet.
ABsquare=ACsquare+BCsquare
(25*25)square=7*7+BCsquare
625=49+BCsquare
BCsquare=625-49
BCsquare=576
BC=root of 576
BC=24.
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