Give an indirect proof of the theorem.
1. If two lines are parallel to a third line then they are parallel to each other
2. Solve the equation S=(n-2) 180 degrees for n when S is a given value. Find the number of sides of the polygon ( if possible) if the given value corresponds to the number of degrees in the sum of the interior angles of a polygon.© BrainMass Inc. brainmass.com October 9, 2019, 9:33 pm ad1c9bdddf
(1) Let the two lines be AB and CD, and let the third line be EF.
Given: AB || EF and CD || EF
To Prove: AB || CD
Proof: If possible, assume that AB and CD are not ...
The expert gives an indirect proof of the theorem. Neat, step-by-step solution is provided.