Perimeter And Area: The Basics | Perimeter, Area, And Volume | Geometry | Khan Academy


Great geometry primer on perimeter and area. Listen carefully. Sal explains the concepts so you’ll understand them.

Practice this lesson yourself on KhanAcademy.org right now:

Watch the next lesson:

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:

Subscribe to Khan Academy:

37 thoughts

  1. i get it!!! yay! i was having trouble understanding perimeter and area in class so i thought maybe i can find a video to help me understand it more. And i found this video! it helped me so much! Thank you so much Khan academy!

  2. Dude thank you know I und Rostand area you are going to make me bomb my test yo bro I love watching your videos

  3. WELL THEN, he forgot to add the squared symbol at the end of the actual answer for area….you supposed to do that right?

  4. ILYSM TOMORROW IS MY QUIZ IN THIS AND I WAS ABSENT FOR THE LAST 2 WEEKS BUT THIS HELPED ME ALOTTTTTTTTTT

  5. ur confusing everyone khan academy. You said perimeter of abcd is 7 plus 5 plus 7 plus 5. Thats equivelent to l plus w x2

Comments are closed.