In Fig, lines l1 and l2 intersect at O, forming angles as shown in the

1.	In Fig, lines l1 and l2 intersect at O, forming angles as shown in the figure. If x = 45, find the values of y, z and u.
Answer» Given that, x = 45° y =? z =? u =? z = x = 45°(Vertically opposite angle) z + u = 180°(Linear pair) 45° = 180° – u u = 135° x + y = 180°(Linear pair) 45° = 180° – y y = 135° Therefore, x = 45°, y = 135°, u = 135° and z = 45°

In Fig, lines l1 and l2 intersect at O, forming angles as shown in the figure. If x = 45, find the values of y, z and u.

Answer»

Given that,

x = 45°

y =?

z =?

u =?

z = x = 45°(Vertically opposite angle)

z + u = 180°(Linear pair)

45° = 180° – u

u = 135°

x + y = 180°(Linear pair)

45° = 180° – y

y = 135°

Therefore,

x = 45°, y = 135°, u = 135° and z = 45°