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A pentagonal prism is cut by a plane perpendicular to the base. What is the shape of the cross section that is formed?
a pentagon with one pair of equal sides
a trapezoid with one pair of parallel sides
a rectangle
a triangle
a hexagon

Answer :

If it is a right prism, then the cross-section area will be considered a rectangle. Each lateral face will be perpendicular to the base, and if we cut the plane it will be perpendicular to the bases and the resulting angles of the cross-section would all be simply right angles. 
Hence,
The best Answer would be third Option: A RECTANGLE.

Answer:

The answer is the second one because i got the third one wrong so yea D:

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