



 
Hi Casey, Here is the diagram you sent. I labeled one vertex $P$ and shaded one face. You also gave us that $A = 10412.98 \mbox{mm, } B = 1955.8 \mbox{ mm, and } C = 227 \mbox{ mm.}$ This shape is called a triangular pyramid and the volume of a triangular pyramid is \[\frac13 \times \mbox{ the area of the base } \times \mbox{ the height.}\] In your situation I would take the face I shaded green as the base since its area is easy to calculate. The area of the base is \[\frac12 B \times C.\] The height is the perpendicular distance from the base to the vertex $P.$ I can't tell from your diagram if $A$ is the height, but if it is not you will need a way to find the height. I hope this helps,  


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