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Math III Videos 103 videos

Unit Rate
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Approximately 874 people per day wonder what a unit rate is. If you're one of them, check out our video on unit rates and how to use them. (We just...

Solving Proportions Using Cross Products
6802 Views

This video covers how to use cross products to solve for a missing number in a proportion by setting that proportion with a variable over the produ...

GED Math 2.4 Rational Numbers
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GED Math 2.4 Rational Numbers. Lucius's favorite restaurant is how many km from his home?

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SAT Math 5.3 Geometry and Measurement 209 Views


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Description:

SAT Math 5.3 Geometry and Measurement

Language:
English Language

Transcript

00:03

Here’s your shmoop du jour, brought to you by pizza.

00:06

We promise you’ll solve this problem in 30 minutes or less, or it’s free!

00:11

Sean is dividing a pizza among 7 friends and himself.

00:15

He cuts the pizza so that each slice has a center angle of 40°.

00:20

If everyone gets one slice, how many are left over?

00:24

Here are the potential answers...

00:27

Our first thought is that this is one lazy pizza place, that didn’t bother to slice its pizza before delivering it.

00:33

Anyway, since Sean does have to take it upon himself to slice said pizza…

00:37

…he decides to get funky with it and cut 40 degree slices.

00:41

Okay, so…what does that mean for our pizza as a whole?

00:44

We’re dealing with a circle, so we know we’ve got 360 degrees in our entire pie.

00:49

If each slice is 40 degrees, then looks like we have 360 divided by 40… or 9…total slices.

00:57

So there are 8 total friends, and 9 total slices.

01:01

Once everyone has had a slice, there will be exactly one slice leftover. So the answer is B.

01:07

And we do not want to be around to witness the fiasco that is sure to follow…

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