T1R1I1H4E1D2R1O1N1S1
14 points
TRIHEDRONS is validvalid
TRIHEDRON, a figure having three plane surfaces meeting at a point [n]
TRIHEDRON, a solid figure with three plane surfaces meeting at a point [n]
TRIHEDRON, a figure having three plane surfaces meeting at a point [n]
TRIHEDRON, a solid figure with three plane surfaces meeting at a point [n]