10. a) ABC is a triangle night angled at C. If AB = 25 cm and AC = 7 cm, find BC.
b) Find the value of x and y in the adjacent figure:
396
X
Y60°
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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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