To operate the calculator, first select three known elements of the triangle to "fix" their values by using the check boxes.
Next, enter the values of the elements in the upper text boxes corresponding to each element.
Last, press the SOLVE button. Pressing the CLEAR ALL button clears all entries.
No solutions One solution Two solutions
On invalid entries, the element windows will display: NaN -- Not a number
A plane triangle is defined by 3 interior angles and 3 line segments.
These parameters are not independent.
Each interior angle is positive and all 3 sum to exactly 180°.
The lengths of the line segments are such that the length of any one side is less than the sum of the lengths of the other two.
Given at least one side and any two of the other parameters, the remaining parameters can be computed.
There may be two, one, or no solutions for some combinations of three given parameters.