Question

Please tell me ans friends..

Answer 1

1. 100

2.45

3.90

4. 100

Answer 2

Since l and m are parallel lines and n is a transversal Angle 1=80degree (given) Angle 2 =180degree - angle1               =180degree - 80degree               =100 degree                (Bcoz it is a linear pair)  If angle 3 is 45degree Then angle7 = angle 3 =45degree               (They are alternate interior a)  If angle 2=90 degree  Then angle 8 will also be equal to angle2 bcoz they are vertically opposite angles  If angle4 is equal to 100degree  Angle4 = angle2 =100 degrees ( bcoz  they are corresponding angles) Angle 2=angle8 =100 degree (Vertically opposite angles)