FIND THE SURFACE AREA OF PRISMS AND CYLINDERS | GEOMETRY LESSON
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- čas přidán 11. 07. 2024
- Learn how to find the surface area of prisms and cylinders including triangular prisms, cylinders, and hexagonal prisms. We'll go over step by step directions on how to identify the base, calculate the area of all the bases and faces, and adding them all together. This lesson is for middle school and high school geometry classes.
Timestamps:
00:00 - Intro
00:13 - What is surface area?
01:07 - Surface Area of a Triangular Prism
04:05 - Surface Area of a Cylinder
06:45 - Surface Area of a Hexagonal Prism
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Hi Everyone! If you happen to notice that the video starts on Problem 2, and not Problem 1, I had actually made a mistake in my solution for Problem 1. Hopefully this isn't too confusing!
This is literally so underrated and good!
Thanks for watching everyone! Good luck on your homework and tests!
the best one yet love it
I understood this really quick!your really good at explaining. My teacher took 3days to explain to this! :)
Thank you! So glad my explanations worked 🙂
We have finished this unit but everything she says are new for me my teacher is kinda ...
I get it now. Thank you 😊
Thank you very very much you made it so much easier than my teacher
Hi All, someone actually corrected me in the first problem! When calculating the area of the faces on the sides (step #2), you should multiply 10in x 4in x 2 plus 10in x 5in x 2. So the total should be 220 NOT 240. Thanks for spotting the mistake! ☺️
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@@maxamillion7128 in the first problem, I calculated the surface area like the base is a square (4x4) but it’s actually a rectangle (4x5)!
@@yourmathtutorvids Figured it out thank you for your help :)
@Ryan Persaud correct! in your comment, that’s calculating the area of the 2 bases.
In my correction, I am calculating the area of the other longer faces (the faces on the sides that look like rectangles)
Wait a minute what are u guys talking about is there any question like this? I mean i am not seeing any given that matches with yours?😮
Thank you so much!!
Glad the video was useful!
Its so clear to understand surface area of prisms but could you make a video on Surface area on pyramids i need to know that for the FSA 7th grade
your explanation is so nice that was really helpful keep the good work👏🏼
So glad this was helpful!
I just remembered i have a pop quiz tmrw morning thank you
Awesome explanation thank you very much❤.
Ty! 🥰
thanks forever grateful 🙏🏿
thank you for watching and sending good math-vibes!
Thanks
This is so random, but thank you so much I was struggling with Surface Area but now everything is so clear! Once again thanks so much
That’s awesome! Yeah sometimes it’s explained in a way that’s more complicated than it needs to be!
The problem became fun😮😮
Wowwww I thought it was very hard tyyyyy😻❤️❤️❤️❤️❤️❤️
Awesome! Yeah once you get the concept of what surface area is, it makes more sense! Just a bunch of separate areas added together
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3:25 aren't the sides having different dimensions because the top and and the bottom rectangle have a side that is 4cm and not 5cm? so it will be 2x(4x10) + 2x(5x10)
Late in replying to your comment but yes! you are right and really good catch! i tried pinning a comment with the corrected answer. unfortunately youtube doesn't let me edit the video after updating :(
9:16: I didn't understand it there. We find the area of rectangle by length x width. Why did you do 2πr??? Can you help me with this! Please
Great question! For our rectangle, the length was 7 ft. The width of the rectangle is not directly given, but it is the same as the circumference of the circle in the cylinder (which you can find by using 2pir).
To visualize it, you can think of unrolling a paper towel.
@@yourmathtutorvids oh, okay! Thanks a lot! 💜💜
What bout volume?
You should really correct your video. I put it on for a struggling student and it simply confused them further when I had to pause it and explain your mistake. Fixing this or just deleting the video would be responsible of you. Just adding a comment in the comment section is not apparent on some viewing apparatuses. It also wouldn’t really help someone who is struggling with this concept.
Thank you for leaving this comment and bringing it to my attention! I didn't realize that if the video is embedded in other websites, the comment section doesn't even show. I can see how if they miss this comment, the video would make the concept even more confusing to students. I have updated the video so that Problem 1 is completely removed. The update should show in the next day or so.
@@yourmathtutorvids It wasn't confusing. It was clear and easy to follow
For the third problem, when using the 'paper towel' analogy, you said that the circumference is 6.28. This was actually double the circumference. You should have had 3.14 as this was the circumference that you previously worked out.
Hi! Thanks for the comment! I think the video is right. The radius is 1ft. The area is pi*r squared but the circumference is 2*pi*r. So it should be 6.28 right? Am I missing something?
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