use the total sum of 180° if two angles are given, add them together and then subtract from 180°, if two angles are the same and unknown, subtract the known angle from 180° and then divid by 2
To determine to measure of the unknown angle, be sure to use the total sum of 180°. If two angles are given, add them together and then subtract from 180°. If two angles are the same and unknown, subtract the known angle from 180° and then divide by 2.
