noun (plural trihedrons or trihedra /-drə/)
A solid figure having three sides or faces (in addition to the base or ends).
- From now on, we will move trihedrons to restore their positions and colors, without moving dihedras.
- A line making equal angles with the edges of a trihedron is called an isoclinal line of the trihedron.
- If this antenna is perfect, the axes of the two trihedrons would be respectively parallel to each other.
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