Which of the following can be the base of a pyramid?

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Line segment

Circle

Octagon

Oval

answer is C.

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Detailed Solution

Given solid is pyramid.
We know that, a pyramid is a three-dimensional shape whose base is a polygon and lateral faces are triangles.
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Therefore, line segment is not the base of the pyramid.
Line Segment, Ray and Line - Definition, Properties, Examples - A Plus Topper

Circle is not the base of the pyramid.
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Octagon has a polygon as a base and its lateral faces are triangle.
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The Oval is not the base of the pyramid.
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Therefore, from above we can say that the Octagon is the base of the pyramid.
Hence, option (3) is correct.

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