Fusion 180 Angle Matcher
This version is for the 180° sketch situation. If your line is 60° from the baseline, the matching angle on the other side is the supplementary angle: 120°. Drag the line visually on the semicircle and it updates live.
60°
Type precise decimal angles here, like 25.25 or 25,25. The slider stays at 1° increments for quick major adjustments.
Common sketch angles
Given angle
60°
Opposite / match angle
120°
Check
180°
Formula
180 - 60
For a straight line in a sketch, the two angles must add up to 180°. So the angle you want is simply 180° minus the one you already drew.
Your angle
Matching supplementary angle
Straight 180° reference