Question

prove that sum of co exterior angles are supplemantry

Answer 1

Co-Exterior Angles are created where a transversal crosses two (usually parallel) lines. Each pair of these angles are outside the parallel lines, and on the same side of the transversal.

NOTE:- '<' be treat as angle.

If you see in the figure,
<AEP and BFR are Co-Exterior angles.

To prove,
<AEP + <BFR = 180° (Supplementary angle)

As applying the use corresponding angles.
So, <AEP = < EFR

Also, <EFR + <BFR = 180° [Straight line]
It can also be written as,
<AEP + < BFR = 180°

Hence, the sum of Co-Exterior angles are 180° (Supplementary).

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Answer 2

Step-by-step explanation:

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