Question

1. If the lines a and b are parellel,then find the value of x in the given figure (figure1) justify your answer.
2.If the line l and m parellel then find x and all other angle in the figure ( figure 2) given ?
this is the question of Maths chapter name lines and angles standard 7 ​

Answer 1

2.the line l and m parellel,and let line n is a transversal.

x+20=80................... alternate angles

x=80-20

x=60

Answer 2

Answer:

figure 1 angle PQR=angle RSP(alt.int.angle)=67°

therefore x°=180°-67°=113°(Linear pair)

figure 2

x+20=80(alt.int.angle)

x=80-20

x=60