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CAHSEE Math Videos 210 videos
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Description:
CAHSEE Math Measurement and Geometry: Drill Set 1, Problem 3. What is the measurement in degrees, minutes, and seconds?
Transcript
- 00:03
Here's a shmoopy question for you...
- 00:05
Brian has left his skateboard leaning up against the wall in the hallway yet again.
- 00:10
His mother trips over it every time it's at an angle of less than 36° 8'.
- 00:15
If the angle of the skateboard measures 36.125°,
- 00:19
what is its measurement in degrees, minutes, and seconds?
Full Transcript
- 00:23
1 degree = 60 minutes, and 1 minute = 60 seconds.
- 00:27
Here are the potential answers...
- 00:30
The question is asking whether we know what a degree, minute and second are...
- 00:34
in circle terms... So... the 36 is just 36 and it stays the same --
- 00:39
we should know this intuitively because 36 degrees is... 36 degrees...
- 00:44
...but we can also look at the answer set -- they all start with 36. So leave that one alone.
- 00:51
Move on to minutes. To convert the decimal
- 00:54
part of degrees, we just multiply that number by 60 to get the partial degree or minutes.
- 00:59
So if we take .125 and multiply it by 60... we get 7.5 minutes.
- 01:06
If we wanna get rid of the decimal in the minutes -- that .5 thing --
- 01:09
then we can state it in seconds. To do so, we again multiply by 60 and we get
- 01:14
.5 times 60 which is... 30 seconds. So the fully converted figure is 36 degrees,
- 01:22
7 minutes and 30 seconds... or answer B. B, as in... "Brian, you're grounded!"
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