If angle ∠A is a right angle, length of BC is ___cm.(All dimensions are in cm). *
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In ∆ CAB, angle A = 90°
by Pythagoras theorem
BC2 = CA2 + AB2
BC2 = 132×132 + 85 ×85
BC2 = 17424 + 7225
BC2 = 24649
taking square root both side
BC = √24649
BC = 157 cm
therefore BC is 157 cm
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