Question 1 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d151f59b460d7261f41e.png' /> In the above figure, BA || ED and BC || EF. Find ($∠$ABC + $∠$DEF)

Question 2 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d14df59b460d7261f417.png' /> In the above figure, find the value of 'x' for which the lines 'l' and 'm' are parallel.

Question 3 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d14ff59b460d7261f41b.png' /> In the above figure, AP and BQ are the bisectors of the two alternate interior angles formed by the intersection of a transversal 't' with parallel lines 'l' and 'm'. Thus, AP and BQ are __________.

Question 6 :
If a transversal intersects two parallel lines, then interior angles on the same side of the transversal are _____________.

Question 7 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d14bf59b460d7261f415.png' /> In the above given figure, if OP||RS, $∠$OPQ = $110^{\circ}$ and $∠$QRS = $130^{\circ}$, then $∠$PQR is equal to _________.

Question 8 :
State true or false: An exterior angle of a triangle is equal to the sum of the corresponding two interior opposite angles.

Question 9 :
If a ray stands on a line, then the adjacent angles so formed are __________ and its converse,