ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos

SAT Math 7.2 Geometry and Measurement 235 Views


Share It!


Description:

SAT Math 7.2 Geometry and Measurement

Language:
English Language

Transcript

00:02

Here’s your shmoop du jour, brought to you by deadly spiders. Hope you don’t have algebraphobia.

00:11

Which of the following could NOT be the value of x?

00:14

Note that the figure is not drawn to scale.

00:16

Here are the potential answers...

00:22

Thank goodness this figure is not drawn to scale.

00:25

For a second there, we were worried we were about to be attacked by this Daddy-long-legs from Hell…

00:29

All right, so this question wants to know what x is definitely not.

00:33

We’re not given any precise values… just a bunch of x’s and y’s…

00:36

so we have to think about what else we know…

00:39

Well… we know that if we add up all these angles, they have to come out to 360.

00:44

Our figure isn’t a circle, exactly, but the angles go all the way around in a circle,

00:49

so it’s basically the same deal.

00:50

Now… what do we have?

00:52

They give us 2x + x + x + y + 2x + x + x + y.

00:59

Once we combine like terms, that gets us to 8x plus 2y.

01:04

We have no idea what y is… all we know is that 8x can’t be more than 360 degrees total.

01:11

So…our first instinct should be to check out E, 50, which is the biggest number of the bunch.

01:17

8 times 50 is 400… which is indeed more than 360.

01:22

If we wanted we could check the others… but even choice D, 40, would be fine.

01:26

8 times 40 is 320, which is under that 360 degree mark.

01:30

So our answer is clearly choice E.

01:32

As in, “Exterminator.”

Up Next

SAT Math 2.1 Geometry and Measurement
2779 Views

SAT Math 2.1 Geometry and Measurement. What is the measure of angle z in terms of x and y?

Related Videos

SAT Math 9.4 Algebra and Functions
1300 Views

SAT Math 9.4 Algebra and Functions

SAT Math 9.2 Algebra and Functions
377 Views

SAT Math 9.2 Algebra and Functions

SAT Math: Identifying an Equation for the Average of Two Percentages
23 Views

In 2014, the unemployment rate of one county in California was 7%. In another county, the unemployment rate was 11%. Which of the following express...

SAT Math: Which Equation Represents Profit?
13 Views

Angela is making cookies for a bake sale. She expects each batch of her cookies to sell for $40. It costs her $10 to make one batch of cookies, and...