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12 An extension angle of a triangle mecane 120° and its interios angles are in the radio 7:5 ·find the angles of the triangle. |
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Answer» Answer: 70°, 50° and 60° Explanation: let the common ratio be x. therefore interior angles are 7X and 5X we KNOW that exterior ANGLE is sum interior angles 7x + 5x = 120° 12x = 120 x = 10° therefore the angles are 7x = 70° 5x = 50° and the third angle = 180 - (70+50) [angle sum pro.] = 60° |
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