Evaluate the number of vertices, sides and diagonals — task. Mathematics CBSE, Class 8.

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Evaluate the number of vertices, number of sides and number of diagonals in 20-gon.

1. The number of vertices in 20-gon is .

2. The number of sides in 20-gon is .

3. The number of diagonals in convex 20-gon is .

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