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Lesson 4: Multiply to find area

# Comparing areas of plots of land

Sal finds area of two rectangles to solve a word problem. Created by Sal Khan.

## Want to join the conversation?

• i can't see corectlly, but are those spaces of land the same shape?
• No it is not
(1 vote)
• why don't you give people 2
why only once.
why not twice.
• Is there a trick for telling when you are doing area or perimeter? If so, what is this trick? I would really like to know. I'm guessing there are multiple.
• That's a hard question to answer...but take in mind that perimeter is the outside of a 2-D shape will area is the land or whatever that it covers. For example a square fence with the dimensions of 12 ft by 12 ft. You can multiply and find out how many ft^2 can fit inside the fence or you can see how much you need to make the outside edges or fences.
• why is everyone commets from like 9 years ago like for reall who cares any way abt yall commets
• it totally confused me that video I mean I thought from the scale he drew it that fibbonachi drive was correct
• To look at the drawings is to estimate the size of something. You need to calculate the exact area using the numbers provided to work out which one is bigger.

I hope this helps.
• is the area the length times width
• Yes. But only rectangles and squares. LxW is the formula for the squares and rectangles; others, like circles and trapezoids, have different formulas.