If a plane including pints p,q, and r cuts through the cube, the shape that will be gotten is a triangle.
What is a triangle?
A triangle is a polygon with three edges and three vertices. The sum of the internal angles of a triangle is equal to 180 degrees.
In this case, when a plane including pints p,q, and r cuts through the cube, the shape that will be gotten is a triangle.
The diagram is attached.
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