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SAT Math 6.2 Geometry and Measurement 173 Views
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Description:
SAT Math 6.2 Geometry and Measurement
Transcript
- 00:02
Here’s your shmoop du jour, brought to you by segments.
- 00:06
For an added challenge, try to solve it while riding a segway. It’s just a seg-gestion.
- 00:13
If AC = CE and AB = DE, then BC is equal to which of the following?
- 00:20
Here are the potential answers...
- 00:23
All righty…so we’ve got this line…which appears to be some sort of subway map…
Full Transcript
- 00:27
…and we’re sitting inside, wondering how long it’s going to be to take us to get from Street B to Street C.
- 00:33
So to solve this one, we’re going to have to think of certain segments in terms of other segments…
- 00:39
For example, we don’t know the length of BC…
- 00:41
…but we do know, just by looking at the diagram, that it’s equal to AC minus AB.
- 00:47
Because AC is equal to CE…
- 00:49
…and AB is equal to DE…
- 00:51
…we can also conclude that BC is equal to CE minus DE.
- 00:56
Well, using the same logic we used in the first place, CE minus DE is the same as length as CD…
- 01:02
…so BC is equal in length to CD…
- 01:05
…which is choice B and we're done.
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