Area and perimeter word problem: table dimensions | Khan Academy

If you know the area and perimeter of a rectangle, you can figure out the length and width. STILL don't believe us?Just watch.

Grade 4th on Khan Academy: 4th grade is the time to start really fine-tuning your arithmetic skills. Not only will you be a multi-digit addition and subtraction rockstar, but you'll extend the multiplication and division that you started in 3rd grade to several digits. You'll also discover that you sometimes have something left over (called a "remainder") when you divide. In 3rd grade you learned what a fraction is. Now you'll start adding, subtracting, multiplying, and comparing them. You'll also see how they relate to decimals. On other fronts, you'll learn how to convert between different units (which is super important when comparing the size and speed of robot unicorns in different countries) and continue your journey thinking about various shapes in two dimensions. Some of the foundational concepts of geometry (like lines, rays and angles) also get introduced. As always, we'll round this out with a healthy dose of applied word problems and explorations of number patterns and properties (including the ideas of factors, multiples and prime numbers). The fun must not stop! (Content was selected for this grade level based on a typical curriculum in the United States.)

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

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[emmaunicorn]

Helps me a LOT! How can he be so smart?

[ThomasGiles]

Cool. Makes sense to me. Though with a tiny bit of algebra (2w + 2l = p becomes w + l = p / 2) the whole thing becomes way easier! ^^

[tiffanyoutlaw]

Thanks for the help bro 🙏🏽. Rlly appreciate it!! Keep on workin!

Ik its very hard for u bro, which is why i supported u by liking this video :D!

[zanenghe]

ty helped me so much getting ready for 6th.

[zuesr]

Sometimes the basic becomes tougher so you sit commenter think before commenting.

[quecheeclub]

These videos are very awesome and they help so many of us but I was wondering something... You talk about the Veda period in Indian history but you don't talk about Vedic Mathematics. Why is that? If I'm correct this is all part of Atharvaveda. I've learned so many ways of making math easier learning those sutras and they can be applied to all aspects of math as far as I've seen so far.

[arrianah]

My problem only gives me the area :<


The area of a rectangular lot is 18 sq km. If its length is twice its width, what are the dimensions of the lot?