ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
ACT Math Videos 164 videos
ACT Math: Trigonometry Drill 1, Problem 1. What is the length of y?
ACT Math: Coordinate Geometry Drill 1, Problem 2. Solve the inequality and determine which solution is shown on the number line.
ACT Math 2.4 Plane Geometry 469 Views
Share It!
Description:
ACT Math: Plane Geometry Drill 2, Problem 4. What is the surface area of a sphere with radius = 6?
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.
Related Videos
ACT Math: Plane Geometry Drill 3, Problem 1. What is the area of the trapezoid shape in the video?
ACT Math: Coordinate Geometry Drill 1, Problem 1. Which inequality is expressed by the number line?
ACT Math: Intermediate Algebra: Drill 3, Problem 1. Find the fifth number in the series.
Haven't you always wondered how much cardboard it takes to encase a trunk warmer for your pet elephant?
Want to figure out the area and perimeter of irregular shapes? Break them down into regular shapes. For example, a flower can be broken down into s...