Develop spatial imagination
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Truncated quadrangular pyramid
At the bottom of the pyramid, the right quadrilateral is a square (all sides are equal, the angles between the sides of the base are 90 degrees)
.The height of the pyramid is exactly in the center of the quadrangular base.
Height = 35
this pyramid can be inscribed in a truncated cone with base radii r = 35 mm and R = 55 mm
Height = 50
this pyramid can be inscribed in a truncated cone with base radii r = 25 mm and R = 50 mm
Height = 80
this pyramid can be inscribed in a truncated cone with base radii r = 20 mm and R = 50 mm
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