The way to do it can be explained like this:
Say AB and CD are the two parallel lines cut by a transversal at E and F respectively.
Then the pairs of alternate interior angles are:
Angle(AEF) and Angle(DFE)
Angle(CFE) and Angle(BEF)
Now lets prove if this is true:
<span>Angle(CFE) +Angle(DFE) = 180
(linear pair)
Also
Angle(CFE) +Angle(AEF) = 180
(Corresponding angles)
</span><span>Equate the above results:
Angle(CFE) +Angle(DFE) = Angle(CFE) +Angle(AEF)
</span><span>Angle(DFE) = Angle(AEF)
</span>Happens the same with
<span>Angle(CFE) = Angle(BEF)
</span>Hope this is very useful for you
Use math-way or photo-math
Ok from the given the best choice to go with will be option B because its going from an up right and its going to flip and rotate.
Answer:

Step-by-step explanation:

→ First look at the first term of each expression and see if they can be simplified, and they can

→ Now look at the a terms, since a larger one is at the top, you subtract

→ Now simplify the b and c terms

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