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Congruent Triangles Videos 8 videos
This postulate helps us compare congruent triangles. We'll get to Einstein's postulates regarding special relativity and inertial frames of referen...
This video is sort of a PSA for SAS, ASA, and AAS. This stuff might show up on the ACT, so watch it ASAP.
As you'll see, we use cats' ears to explore the congruency of various triangles. Oh, calm down and stop dialing the the Humane Society. They're sti...
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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