Question 63

A triangular prism has 9 edges. How many vertices does it have?

Solution

Triangular prism :

Euler's formula : $$V + F - E = 2$$ where V is number of vertices , F is number of faces and E is number of edges.

Triangular Prism has 9 edges and 5 faces.

=> $$V = 2 + E - F = 2 + 9 - 5$$

=> $$V = 11 - 5 = 6$$

=> Ans - (B)

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