Choose the correct answer from the alternatives given. Count the number of triangles in the figure given below.
A
15
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B
19
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C
22
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D
21
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Solution
The correct option is D 21 The figure may be marked as shown in the following diagram. The triangles in the figures are as follows: 1, G, 3, E, 4, D, 6, B, 7, A, 24, FD, 78, A9, 1G, 4D, 7A, GF, 12, 24DF, A789. Total triangles 21