I've done all I can on this homework and I just need a slight nudge in the right direction.

What is the distance formula?

What is a seven sided figure called?

What is a five sided figure called?

A room is 15.5 feet long by 10 feet wide. Carper costs x per square foot. How much does it cost to carpet the room? (I put x so nobody goes and solves it -.- I just want to know how its done, so please show me how to set it up.)

How do you find the area of a triangle?