Question

A triangular pyramid is cut by a plane. In which case is the cross section a quadrilateral?

Answer 1

For the answer to the question above, if you cut it directly to the middle, then the cross section will be an isosceles trapezoid, which is also a quadrilateral.
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Answer 2

Answer:

C.

when the plane intersects the base and two lateral faces of the pyramid

Step-by-step explanation: