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Area and Volume Videos 38 videos
Los cubos de hielo no son ruidosos generalmente...pero tienen un volumen de tipo diferente. Este video te enseñará cómo encontrar el volumen de...
Volume is crucial to our lives. It determines the amount of food we eat, the amount of fluid we drink, and hydraulics, just to to name a few. One o...
Haven't you always wondered how much cardboard it takes to encase a trunk warmer for your pet elephant?
ACT Math 2.4 Plane Geometry 469 Views
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Description:
ACT Math: Plane Geometry Drill 2, Problem 4. What is the surface area of a sphere with radius = 6?
Transcript
- 00:02
For a good time, solve this shmoopy question.
- 00:04
What is the surface area of a sphere with radius = 6?
- 00:09
And here are the potential answers...
- 00:13
Alright, so what is this question asking? Well, you have to have memorized
- 00:17
the formula for the area of a sphere.
Full Transcript
- 00:20
It's 4 times pi times radius squared.
- 00:23
The evil test overlords have given us the radius --
- 00:26
it's 6.
- 00:27
So all we have to do is plug it in and do the math.
- 00:32
It's 4 times pi times 6 squared. Well, we know 6 squared is 36 so we just simplify by
- 00:38
multiplying 36 times 4 to get 144.
- 00:42
The answer is C - 144 pi.
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