**A pyramid is constructed on a cuboid. The figure has**

### Question

A pyramid is constructed on a cuboid. The figure has### Options

A)

Twelve faces

B)

Sixteen edges

C)

Thirteen vertices

D)

Fifteen edges

The correct answer is B.

### Explanation:

A cuboid has 12 edges and a square pyramid has 8 edges. Therefore, 12 + 8 = 20 edges in total. However, since the pyramid is constructed on the cuboid, the top of the cuboid is shared with the base of the pyramid resulting in 4 redundant edges. Subtract the four edges from the total of twenty to get 20 - 4 =

**16 edges**.### More Past Questions:

## Discussion (4)

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Just count the number of lines to draw the image...you get 16...that's 16 edges

It has 9 faces and 9 vertices

A cuboid has 8 vertices (edges) and a rectangular based pyramid has 5 edges so all together is 8+5 = 13 edges

A cuboid has 12 edges and a square pyramid has 8 edges. Therefore, 12 + 8 = 20 edges in total. However, since the pyramid is constructed on the cuboid, the top of the cuboid is shared with the base of the pyramid resulting in 4 redundant edges. Subtract the four edges from the total of twenty to get 20 - 4 =

16 edges.it is 9 edges from the fogure formed