Question

in right angled ∆ABC, hypotenuse AC=10 & side AB=5. Then find measure of angle A explain step by step
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Answer 1

Area of △ABC considering BC as base and AB as altitude:

1/2 ×AB×BC=12×5×10=25

AC=AB2+BC2√=5(2)+10(2)√=55

Area of △ABC considering AC as base and BD as altitude:

1/2×AC×BD=25

⟹1/2×55–√×BD=25⟹BD=25–√