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How many triangle is in the given figure?
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30 40 50 45 |
45 |
The number of triangles in the given figure is: Number of horizontal lines = 3 Trick = (1 + 2 + 3 + 4 + 5) × ( number of horizontal lines ) (1 + 2 + 3 + 4 + 5) × ( 3 ) = 45 |
