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## Basic geometry and measurement

### Course: Basic geometry and measurement>Unit 1

Lesson 10: Area versus perimeter

# Area & perimeter word problem: dog pen

Sal figures out the width of a dog pen. Created by Sal Khan.

## Want to join the conversation?

• How would you figure the area of a pentagon?
• you would find it by timeing all the sides and you will get your answer like you wanted.
• hey i need votes plz vote i will vote whoever votes me.
• Aaand that's what you get for not specifying which kind of vote! Seriously though, it's cringe to beg for upvotes. Especially on an otherwise blank comment that isn't even relevant to the video. You know, the GEOMETRY LESSON that this is the comment section for? If you want upvotes, post something that actually deserves them by virtue of being a legitimately commendable addition to the topic. Goodbye and have a nice day!
• Lisa built a rectangular flower garden that is 4 feet wide and has a perimeter of 26 feet.
• First, you multiply the width by 2. The product is 8. Next, you subtract 8 from the perimeter which is 26, and the difference is 18. Afterwards, 18/2 = 9. This means that 9 is the length. If you want to figure out the area, just multiply 4 and 9, and the product is 36 feet squared.
• I need a badge so plz vote
• Aaand that's what you get for not specifying which kind of vote! Seriously though, it's cringe to beg for upvotes. Especially on an otherwise blank comment that isn't even relevant to the video. You know, the GEOMETRY LESSON that this is the comment section for? If you want upvotes, post something that actually deserves them by virtue of being a legitimately commendable addition to the topic. Goodbye and have a nice day! (Good luck with the badges BTW.)
(1 vote)
• How to calculate depth?
• Depth is not something that you would calculate so much as you would just measure it. You would need a starting place - something like sea level (the surface of the sea), then you would just measure down to the bottom to find depth.
• can someone vote this? im tryna get a badge
• Is there another way of doing this?
For example, what I learned was 78/2 and then take that answer and subtract by the one length that the problem gives you, because the formula that I learned was 2(L+W).

And also, which is the fastest and easiest way of doing this??