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ACT Math 2.1 Plane Geometry 484 Views


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ACT Math: Plane Geometry Drill 2, Problem 1. What is the perimeter of the shape shown?

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Transcript

00:02

Here is your shmoop de jour...

00:05

What is the perimeter of the shape below?

00:08

And here are the potential answers...

00:13

Okay the key thing we have to notice here is this distance 4

00:16

which is exactly half of this distance 8

00:20

and this distance 3 which is exactly half of this distance 6

00:24

Suddenly have a right triangle with sides 3 he ran for their

00:28

and thanks to Pythagoras we know that a squared plus B squared equals C squared

00:34

that 3 squared 9 plus 4 squared 16

00:38

equals by square 25 take the square root of 25 and thats how we got 5

00:42

thing. Now just add the perimeter lines and we have 3 plus

00:46

8 plus 6 plus 4 plus 5 and our perimeter here is 26.

00:51

Answer D.

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