Another. (:

Question

Another. (: <3

Gordon is writing a proof of the theorem stated below.
 
Theorem: The sum of interior angles of a triangle is 180°.
 
He first drew the figure shown below.
 http://learn.flvs.net/webdav/assessment_images/educator_geometry_v14/pool_Geom_3641_1000_Subtest_01_02/image0034e8c4bc3.jpg

 
Which theorem will he most likely use in the proof?

Supplements of congruent angles are congruent.

 A linear pair of angles is supplementary.

 If two angles of a triangle are congruent, the sides opposite these are congruent.

 If two sides of a triangle are congruent, the angle

anonymous · Answer

D. If two sides of a triangle are congruent, the angles opposite these sides are congruent.