Genius! Can you give answer?

If one of the angles by two intersecting lines is a right angles, what can you say about the other three angles ? Give reason for your answer.

If you see a person whose clothes are on fire, how will you extinguish the fire ? Give reason for your answer.

What is pressure? Give its units and demensions. How can you measure it?

Can all the angles of a quadrilateral be acute angles ? Give reason for your answer.