In the given figure l || m and p || q. Find the angles x, y, z.

Consider p || q and m is a transversal:

x° = 70° $\quad$[Alternate angles]

Since, m is a straight line:

x° + z° = 180° $\quad$[Linear pair]

⇒ 70° + z° = 180°

⇒ z° = 180° - 70°

⇒ z° = 110°

Now, consider l || m and p is a transversal:

y° = x° $\quad$[Alternate angles]

∴ y° = 70°

x° = 70°, y° = 70° and z° = 110°