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Triangles Videos 32 videos
This video covers the different types of triangle. What makes a triangle isosceles, scalene, or equilateral? What about the different kinds of angl...
Sine is the opposite over the hypotenuse; cosine is the adjacent over the hypotenuse; and tangent is the opposite side over the adjacent side....
Someday you might be a big, fancy defense lawyer, and you'll have to prove that your client's triangle was congruent to the triangle in question. W...
CAHSEE Math 6.3 Measurement and Geometry 202 Views
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Description:
Measurement and Geometry Drill 6 Problem 3. If triangle ABC is congruent to triangle XYZ, then XYZ must be which of the following?
Transcript
- 00:03
Here’s an unshmoopy question you’ll find on an exam somewhere in life.
- 00:07
If triangle ABC shown below is congruent to triangle XYZ, then ΔXYZ must be which of the following?
- 00:14
And here are the potential answers...
- 00:19
Ok, what is this question asking?
- 00:22
Really… just that we know what “congruent” means.
Full Transcript
- 00:30
Good thing we stayed awake in class the day they went over all the vocab.
- 00:34
For two triangles to be congruent, all corresponding sides and angles must be the same.
- 00:41
A is ruled out because… no offense, but it’s a big fat fatty.
- 00:46
The angle at the top is bigger, and the angles at the bottom are smaller.
- 00:51
The triangle in B is oriented differently… but check it out.
- 00:54
All angles and side lengths appear to be equal, even if some sneaky person DID rotate the thing.
- 01:01
What about C?
- 01:02
Looks like we’ve got a right angle here…
- 01:04
…while ABC is more… equilateral. So let’s cross that one off, too.
- 01:09
Finally, D… not even close. Here we have an angle even greater than 90 degrees.
- 01:14
Must be from Florida.
- 01:17
Choice B. That's it. Choice B is the one... “Best answer.”
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