In ∆, ∠ = ∠ and BC=4 cm and AC = 5 cm, then find the length of AB
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Answer: AB=3cm
Step-by-step explanation: By Pythagoras theorem
AB^2=AC^2-BC^2
AB^2=5^2-4^2
AB^2=25-16
AB^2=9cm
AB=3cm
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