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Side-Side-Side (SSS): all three sides are known. The law of cosines gives each angle.
Side-Angle-Side (SAS): two sides and the angle between them. The law of cosines gives the third side.
Angle-Side-Angle (ASA): two angles and the side between them. The third angle is 180° minus the other two, then the law of sines gives the other sides.
Angle-Angle-Side (AAS): two angles and a side that is not between them. Solved the same way as ASA.
Side-Side-Angle (SSA): two sides and an angle that is not between them. The law of sines gives a second angle, but zero, one or two triangles can fit.

已固定计算得出

角度

单位小数位

重置

数值

边

角

始终有三个数值被固定。输入新数值后，它也会被固定，最早固定的数值随之解除。支持 sqrt(2)、3/4 等表达式。