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Ratio of the angles of a triangle are 1 : 2 : 6. What is the smallest angle? |
30 degree 40 degree 20 degree 45 degree |
20 degree |
Ratio of angles = 1 : 2 : 6 Sum of all angles of a triangle = 180° = 9r ⇒ 1r = 20° The smallest angle = 20 degree |
