To find the area, you would multiply length times width. For example, to find the area of problem number 1, I would multiply 8 (length) times 2 (width) to get the area of 16. I hope this helped! If you need another example, feel free to ask! :-)
Areas of quadrilaterals follow the formula A = bh, where b is the base and h is the height. What this formula means is you multiply the base length by the height length and you will have the area. The important thing to remember when calculating area is that the result will always be in units squared (example: 24 cm²). I'll do a few:
1) A = bh A = 8(2) A = 16 units²
(Since there is no unit given, just use the word units.)