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SAT Math 1.4 Geometry and Measurement. If the sides of a square increase in size by 25%, what happens to the area of the square?
SAT Math 1.5 Geometry and Measurement. How many jars of paint will Sierra need?
SAT Math 7.2 Geometry and Measurement 235 Views
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Description:
SAT Math 7.2 Geometry and Measurement
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.
Full Transcript
- 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.”
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