How do you prove angles are supplementary?
1 Answer
You must prove that the sum of both angles is equal to 180 degrees. ("If two angles form a linear pair, then they are supplementary; that is, the sum of their measures is 180 degrees.")
Explanation:
A good way to start is to look at your geometric theorems and think about if you could use any to determine the measurement of your angles.
A few ways to consider include:
a) Determine the measurement of
b) Determine that the measurement of
You can find a comprehensive list of geometric theorems here:
http://www.rio.k12.wi.us/M_Hschool/math/geo1.html
This is also the source from which I retrieved the theorem I posted in the above answer.