# Identifying Parallel And Perpendicular Lines | Geometry | Khan Academy

Let’s now apply what we learned and do an exercise together in which we identify parallel and perpendicular lines.This is great practice.

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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.

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## 6 thoughts

1. BibleBeltPearlist says:

It is interesting to understand that you can disprove parallel lines using non-euclidean geometry.

2. Brittany Allen says:

thank u so much this helped me on my homework

3. Brittany Allen says:

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4. Rodwin Rodas says:

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5. sam sam says:

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6. CARLOS CORIA MATA says:

I don’t get it I’m learning this I am in 4 grade