Finding surface area: nets of polyhedra | Perimeter, area, and volume | Geometry | Khan Academy

Now we shift our focus towards surface area (which is the sum of all the areas of all the shapes that cover the surface of the object). Let's apply it to the polyhedra net we learned about in the previous video. We'll walk you through it.

Missed the previous lesson?

Geometry on Khan Academy: We are surrounded by space. And that space contains lots of things. And these things have shapes. In geometry we are concerned with the nature of these shapes, how we define them, and what they teach us about the world at large--from math to architecture to biology to astronomy (and everything in between). Learning geometry is about more than just taking your medicine ("It's good for you!"), it's at the core of everything that exists--including you. Having said all that, some of the specific topics we'll cover include angles, intersecting lines, right triangles, perimeter, area, volume, circles, triangles, quadrilaterals, analytic geometry, and geometric constructions. Wow. That's a lot. To summarize: it's difficult to imagine any area of math that is more widely used than geometry.

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy’s Geometry channel:

[suckmypp]

This is very helpful. Thank you for posting this. The app was glitchy and didn't let me watch any videos, so I came to YouTube and searched up "how to find the area of polyhedra nets" and this came up I was very happy. Thank you again.

[folumotunde]

My teacher made me watch this, its helpful though

[oceanticserina]

Thank you so much this helped me big time in school

[michellelee]

Um isnt da area 52 centimeter square??

[tickyotacky]

I was the 80th person to give a thumbs up!

[tiredsheepy]

Sorry this didn't help me but thank I kind of understand it

[ariscora]

This one was my math problem 5and2 yass

[kagu]

Y E A H T H I S I S B I G B R A I N T I M E

[OfficialArmaniJ]

the spaces all equal something so whats confusing

[EffectAimHimself]

Anyone else being forced to watch this