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Perimeter Videos 15 videos
GED Math: Measurement Drill 1, Problem 1. The area, in square inches, of the shaded region where the two rectangles overlap is...what?
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Perimeter of a Rectangle 3862 Views
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Description:
Rectangles just love to have perimeters. And we just love to measure them.
Transcript
- 00:04
Perimeter of a Rectangle, a la Shmoop. Lance Armstrong has had a media storm of evil-wishers
- 00:11
show up at his doorstep recently.
- 00:14
He needs to install a state-of-the art video-surveillance Wi-Fi-controlled weapon-of-mass-destruction-armed
- 00:20
electric fence.
- 00:23
But he donated nearly all his money to cancer research.
Full Transcript
- 00:26
So he’s going to have to buy a fence on the cheap…
- 00:30
… which means he needs to know how to build a rectangular fence around his compound with
- 00:34
the smallest perimeter. Lance knows that he needs at least 36 square
- 00:38
miles of land for his palatial mansion, biking trails, and factory of lies.
- 00:46
What is the smallest possible perimeter for his rectangle?
- 00:54
The formula for the area of a rectangle is length times width…
- 00:58
…while the formula for the perimeter is the sum of 2 times the length and 2 times
- 01:07
the width. Or the sum of all four sides.
- 01:12
To get an area of 36, here our options for the rectangle’s dimensions:
- 01:21
36 by 1 18 by 2
- 01:23
12 by 3 9 by 4
- 01:26
and 6 by 6.
- 01:28
And here are their corresponding perimeters: 70, 40, 30, 26, and 24.
- 02:02
Of these choices, 24 is the smallest perimeter possible.
- 02:09
And good thing it’s one of our answer choices!
- 02:14
Hello, answer (B).
- 02:23
Lies, Lance, lies.
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