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SAT Math 1.1 Algebra and Functions. Find an algebraic equation to correspond with the data.
SAT Math 1.1 Geometry and Measurement. What is the circumference of the circle?
SAT Math 1.1 Numbers and Operations. How many combinations of beverage and cereal can be made?
SAT Math 2.5 Geometry and Measurement 258 Views
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SAT Math 2.5 Geometry and Measurement
SAT Math 2.5 Geometry and Measurement
Transcript
- 00:02
Here’s your shmoop du jour, brought to you by isosceles triangles. I came, I saw, I sosceles.
- 00:11
Triangle ACD is an isosceles triangle, and CD is parallel to BE.
- 00:16
What is the perimeter of triangle ABE?
- 00:20
Here are the potential answers...
- 00:24
Okay, so times are hard, and there’s a mad cheese shortage.
Full Transcript
- 00:27
So…we have to leave out a smaller hunk of cheese to catch that mouse who’s been running
- 00:31
around our office like he owns the place…
- 00:33
Okay, our cheese triangle needs a downgrade. Now… because we’re told that CD is parallel
- 00:37
to BE, we know that triangles ABE and ACD are similar.
- 00:42
We’re also told that ACD is an isosceles triangle… and because all similar triangles
- 00:47
maintain the same proportions, we know that ABE is isosceles as well.
- 00:52
And THAT means that sides AD and AC are equal.
- 00:58
We can subtract the 6 they give us from 16 to get a side length
- 01:01
for AB of 10… which is also the length of AE.
- 01:06
And it’s mere addition from here to get our perimeter… 10 plus 10 plus 8 is 28…
- 01:10
…Answer is B. As in “brie.”
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