三面角是指有三个面的多面角，三面角的任意两个面角的和大于第三个面角，三个面角的和小于4个直角，三面角的3个二面角的和大于2个直角，小于6个直角。
n. tripod
misc. trihedral angle
球面三角学 spherical trigonometry ; spherics
直三面角 [数] rectangular trihedral angle
三角化四面体 Triakis tetrahedron
对称三面角 symmetric trihedral angles
三角面片球体 GeoSphere
三角化八面体 Triakis octahedron
球面三角形 [数] spherical triangle ; spherical trionometry ; triangle
全部三角面中心 All Face Centers
平面三角形 [数] plane triangle ; flat triangle
三面角反射器的计算结果与实验结果基本吻合。
The calculated results of trihedral corner reflectors agree with the experimental results.
复杂的多界面导体散射体，如二面、三面角反射器与飞行器圆筒进气道等大多可由以上两种界面组成。
Then scattering field of the more complicated scattering targets, such as a dihedral, a trihedral, or a cylindrical inlet, constructed by the surfaces of …
应用AP／PO方法计算了三面角反射器的雷达截面（RCS）．计算结果与用FDTD方法得到的结果有很好的一致性。
RCS of a square trihedral corner reflector is calculated with the AP/PO method. The AP/PO results is in good agreement with those obtained by FDTD method.
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