Question 1058286
.
This 3D solid body (solid shape) is called "pyramidal frustum", or "a frustum of pyramid".


See the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/geometry/pyramidal-frustum-volume.lesson>Finding pyramidal frustum volume</A> 

in this site on finding the volume of a pyramidal frustum.


You have this free of charge online textbook on Geometry

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/Triangles/GEOMETRY-your-online-textbook.lesson>GEOMETRY - YOUR ONLINE TEXTBOOK</A>

in this site. 


The referred lesson is the part of this textbook under the topic "<U>Miscellaneous advanced Geometry problems</U>".