Triangle Calculator (Sides / Area / Angles)
Solve any triangle given 3 known sides or 2 sides + 1 angle (Law of Cosines / Sines).
Result
Type
Scalene
Right triangle?
Yes
Perimeter
12.00
Area
6.00 sq units
Angles (A, B, C)
36.9°, 53.1°, 90.0°
About this tool
Enter any 3 sides, or 2 sides + included angle, or 1 side + 2 angles. Get all 6 unknowns (3 sides + 3 angles), the perimeter, the area, and the type (acute / right / obtuse). The r/math and r/learnmath 'how do I solve a triangle with 2 sides and an angle' answer.
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