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### Course: Class 6 (Foundation)>Unit 9

Lesson 2: Counting unit squares to find area

# Measuring rectangles with different unit squares

Sal finds area of a rectangle with different sized units. Created by Sal Khan.

## Want to join the conversation?

• at what is a furgle
• A furgle is a made-up unit of measurement.

1 furgle = 2 feet

At , Sal comments that "one furgle" is something that he made up just for this video, so that we can practice measuring identical rectangles with two different units: feet & furgles.
• So, can you just use all six of the mini units that are 1 square foot and make a big square and do it the same for the other side? It will have the same amount of space, but different areas. Can we do that if it is possible?
• yes you can ,but both will have the same area because it has the same amount of space the only difference is that they will be measured in different square units
for example the measure of a square, measured in mm will be the same as measure in cm just that there will be a difference in number because u r using 2 different units but when u convert the answer u get in cm to mm the area will be the same
hope this helped
• What is a "voot" as used in the video at @ seconds?
• A "voot" is an made-up uint sal made so we can understand the concept better.
• A rectangle has an area of 18"and the height of the rectangle is 6 inches what is the length of the rectangle
• Remember that the area of a rectangle is its length x its height. So, we know the formula is (l x h = a).

Let's plug in our known values: (l x 6 = 18)

Let's rearrange to isolate the variable: (18 / 6 = l)

Let's solve for the length: (l = 3)

So, the length of the rectangle is 3 inches. It's simple algebra! Let me know if you have further questions.
• how does area help the real world
• It helps in panting spaces in a lot or planting seeds,and placing tiles in your house.
• At what is a feet? And why does it sound weird?
• It sounds weird because Sal is actually saying 'veet' and not 'feet.' Presumably 'veet' is the plural form of 'voot.' Sal is comparing feet and veet (a fictional unit) to show how we can use different units of area to measure the same object, but we have to take into account that the units are not of equal size.
• What is a furgle
• A furgle is a made-up unit of measurement.

1 furgle = 2 feet

At , Sal comments that "one furgle" is something that he made up just for this video, so that we can practice measuring identical rectangles with two different units: feet & furgles.
• What is a voot?