Main content
Course: 3rd grade > Unit 10
Lesson 6: Decompose figures to find areaArea: FAQ
Frequently asked questions about finding area.
What is area?
Area is the amount of space a two-dimensional, or a flat, shape covers.
What's the distributive property and how does it help us find area?
The distributive property tells us that we can break a multiplication problem into two smaller problems and then add the results together. This can be really helpful when we're trying to find the area of a shape that's made up of two or more smaller shapes.
How do you find the area of a rectangle?
If a shape is made up of unit squares, we can count the number of squares to find the area. So, for example, if a shape is made up of unit squares, the area is square units.
To find the area of a rectangle, we multiply the length by the width. So, for example, if a rectangle has a length of inches and a width of inches, the area is square inches.
How can we find the missing side length of a rectangle if we know the area and the other side length?
We can use the formula for the area of a rectangle to solve for the missing side length. For example, if we know that the area of a rectangle is square inches and the width is inches, we can set up the equation and solve for to find that the length is inches.
Why do we need to learn about area?
Area is a really important concept in math, and it's used in a lot of real-world situations. For example, if you're painting a room, you need to know the area of the walls in order to figure out how much paint to buy.
Want to join the conversation?
- I like this to be honest it can be a little hard sometimes but for the most part when you actually understand it, it's easier.(30 votes)
- I have a Question why are you making this stuff way to easy? (no offence though)(7 votes)
- Not everyone knows or understands math. A lot of people find the subject challenging so Khan Academy breaks it down and simplifies it in ways that make it easy to learn and understand for kids who are still learning math and for adults who never got the education.
Edit: Additionally, it's also for people who just want the refresher since they've been out of school for a while. It doesn't hurt and it isn't uncommon to go over material you already know so it stays fresh in your mind.(30 votes)
- you can do this(13 votes)
- sometimes area is confuseing but just multipil length time with to get your answer(11 votes)
- You know every time I get every exercise wrong, but then I found out that if I keep watching the video again and again, and make up some problems, then I can be a master at it. Now, this is easy peasy lemon sqeasy!(9 votes)
- Why is this ann assignmrnt(3 votes)
- dude, this is a third grade standard(10 votes)
- Now I know 137 (width) 7809 (area) so I think 7809/137=57(7 votes)
- WhAt is this number 100,000,000,000,000,000,000,000(6 votes)
- you like it? I hate it.(4 votes)