A cross section is made by the intersection of a plane and a square pyramid at an angle either parallel or perpendicular to the base. The cross section can be which of these shapes? Choose three correct answers.

A plane parallel to the square base makes a square cross section. A plane perpendicular to the base can pass through the pyramid’s apex, making a triangle, or miss the apex, making a trapezoid. It cannot make a non-square rectangle because the pyramid’s sloping sides converge toward the apex; a circle is not possible with this pyramid.

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