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Perimeter Videos 15 videos

Perimeter of Irregular Shapes
4864 Views

Want to figure out the area and perimeter of irregular shapes? Break them down into regular shapes. For example, a flower can be broken down into s...

Perimeter and Circumference
10659 Views

It's super useful to be able to find the distance around stuff. Like when you’re being pursued by authorities while running around the base of an...

Perimeter of a Rectangle
3862 Views

Rectangles just love to have perimeters. And we just love to measure them.

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ACT Math 2.3 Plane Geometry 244 Views


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Description:

ACT Math: Plane Geometry Drill 2, Problem 3. What is the perimeter of the object in the video?

Language:
English Language

Transcript

00:02

And here's your shmoop de jour...

00:04

What is the perimeter of the object below?

00:07

And here are the potential answers...

00:11

It's all about visualization -- can we see 2 rectangles here?

00:15

We are being asked for the perimeter, which is the distance all the way around...

00:15

We are being asked for the perimeter, which is the distance all the way around…

00:19

...so we are just going to add a bunch of numbers together.

00:22

And we can fill some in... this line is the same length as this line so we can label it

00:27

with a "3"... this line is the same distance as that line so we can put a "5" here...

00:32

So all that's left is figuring out this line. We know the height is 6 because of this

00:37

4 and this 2...

00:39

...so we can subtract this 4 from 6... and we know that this line is also 2.

00:44

Now we just add the numbers -- and we have 4 plus 3 plus 2 plus 5 plus 4 plus 5 plus

00:50

2 plus 3... is 28.

00:52

The answer is B.

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