In a right-angled triangle ABC, angle C = 90 degrees, AC = 5cm, BC = 5√3 cm. Find angle B and hypotenuse AB

AB² = AC² + CB² = 5² + (5 √3) ² = 25 +75 = 100 (cm²);

AB = 10 cm;

AC = 5 = 1/2 AB, so <B = 30 °.



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