In a triangle ABC, right angled at B, AB = 12 cm and AC = 13 cm. Find BC.
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Answer:
BC = 5 cm
Step-by-step explanation:
By Pythagoras Theorem,
(AB)² + (BC)² = (AC)²
=> (12)² + (BC)² = (13)²
=> 144 + (BC)² = 169
=> (BC)² = 169 - 144
=> (BC)² = 25
=> BC = 5 cm
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