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Does thinking about 3D Geometry get you bent out of shape? Never fear! Watch this video and figure out some fun new shapes to bend back into. We're...
Haven't you always wondered how much cardboard it takes to encase a trunk warmer for your pet elephant?
Es una cosa cuando todas esas figuras geométricas están puestas en un pie de la página, pero cuando estas empiezan a expanderse y a invader nues...
SAT Math 6.4 Geometry and Measurement 287 Views
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Description:
SAT Math 6.4 Geometry and Measurement
Transcript
- 00:03
Here’s your shmoop du jour, brought to you by parallel lines.
- 00:07
Some are more delicious than others.
- 00:11
ABCD is a parallelogram. If angle B is equal to 30°, what is the measure of angle ACB?
- 00:20
Here are the potential answers...
- 00:22
Okay, what do we know about parallelograms…?
Full Transcript
- 00:25
They look like rectangles that an elephant sat on…
- 00:27
Well, we know that opposite sides are… parallel, obviously.
- 00:31
We also know that opposite angles are congruent.
- 00:35
So…because we’re told that angle B is 30 degrees…
- 00:38
…we know that angle D is 30 degrees as well. Great.
- 00:41
We’re dealing with a four-sided polygon, so we must have 360 total degrees.
- 00:46
If 30 and 30…or 60…are already accounted for…
- 00:48
…then the two remaining angles must make up the difference.
- 00:51
So just subtract those 60 degrees from the 360 and we get 300…
- 00:55
and once again we have opposite angles that must be equal.
- 00:59
So…300 divided by 2 is 150.
- 01:03
Line AC is bisecting that angle…leaving us with an angle of 75 degrees.
- 01:09
Answer E.
- 01:10
As in, “Elephant.”
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