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Two example problems involving similarity
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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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Watch video Similarity example problems | Similarity | Geometry | Khan Academy online, duration 07 minute 37 second in high hd quality that is uploaded to the channel Khan Academy 02 October 2011. Share the link to the video on social media so that your subscribers and friends will also watch this video. This video clip has been viewed 736 thousand times and liked it 1 thousand visitors.