Sine Triangle Calculator
The sine triangle calculator is a tool that will help you determine the sine of any angle given in degrees, radians, or pi radians.
Solved for side b8.573214
Sides7, 8.573214, 9.562178
Angles45°, 60°, 75°
Common ratio9.899495equals the circumdiameter
Area28.983811
Perimeter25.135392
The formula
a ÷ sin A = b ÷ sin B = c ÷ sin C
The ambiguous case
Given two sides and a non-included angle (SSA), there can be two valid triangles: arcsin returns an acute angle, but its supplement often works too. If you solved for an angle above, check whether 180° − B also gives a valid triangle — it usually does when the side opposite the known angle is the shorter one.