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One angle of a triangle is 150° and its opposite side 3 centimetre. Find the diameter of its circumcircle. |
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Answer» In DABC, ∠B = 150°, AC = 3 cm Draw diameter AD and join CD ∠ADC = 180 – 150 = 30°, ∠ACD = 90° Angles of DADC are 30°, 60°, 90° 30° 60° 90° 1 : √3 : 2 ↓ ↓ ↓ 3 3√3 6 Diameter, AD = 6 cm |
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