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Find the number of triangles in the following figure.(1) 16 (2) 32 (3) 40 (4) 80 |
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Answer» (3) 40 5C2 x 1C1 ⇒ \(\frac{5\times4}{2\times1}\times1\) ⇒ 10 from one triangle So, 10 x 4 = 40 |
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