Kurosaki Akatsu Coordinator
10/03/2017 at 11:33
mathlove 12/03/2017 at 12:37
Suppose that the triangle ABC has A = 90^{0}, B = 60^{0}, AB = 4. We construct the rectangle ABCD with center O. By the assumption B = 60^{0} , assune that OAB is a equilateral triangle; OB = AB = 4, BC = 8. By the theorem Pytagor we have\(AC=\sqrt{BC^2AB^2}=\sqrt{8^24^2}=4\sqrt{3}\). So \(BC=8,CA=4\sqrt{3}\).
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Kudo Shinichi 22/03/2017 at 22:13
It so good for me in the future , thanks you :))