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Answers
Answer:
Proven that:
i. ∠1 = ∠2
ii. ∠1 = ∠2 = ∠3 = ∠4
Step-by-step explanation:
If two parallel lines are cut by a transversal, then the corresponding angles are congruent.
PS and QR are opposite sides of the parallelogram. i.e. PS and QR are parallel lines and Line SR is a traversal.
Therefore, ∠1 = ∠4.
Now, lets extend line SP in the direction S to P and further. We will get ∠5 corresponding to ∠4 since SR and PQ are parallel lines and line SP is a traversal. By same argument ∠4 = ∠5. Now ∠5 = ∠2 since they are vertical angles. Therefore, ∠1 = ∠4 = ∠5 = ∠2. That is ∠1 = ∠2. This proves question (i).
Now ∠2 and ∠3 are corresponding angles, as PS and QR are parallel lines and line PQ is a traversal. Therefore, ∠2 = ∠3.
Combining the above, ∠1 = ∠2 = ∠3 = ∠4