如何用纯几何法证明共焦点椭圆、双曲线的这一光学性质? 知乎 Template




You need a modern browser try chrome, to view this.

Background image: Hide Show

View Larger Image Image Credit: zhihu.com






Try and sketch some of thesePuffin, Circus, Compass, Pajamas, Saw, Pig, Harp, Notebook, Record player, Peninsula, view more ideas


please wait, the page is loading...

More Sketches

Take a peek at some of the sketches created by our users, are you a sketchite?

anonymous
anonymous
sketch #22


anonymous
anonymous
sketch #4532


anonymous
anonymous
sketch #1095


anonymous
anonymous
sketch #5256


anonymous
anonymous
sketch #3264 Lisa by Shaban Khan


anonymous
anonymous
sketch #1226 the man


anonymous
anonymous
sketch #5135 &#;Hypno Colorfull&#; by Lars Tunebo


anonymous
anonymous
sketch #3244 Winnie the Pooh by Ashok Kumar Chaturvedi


Chris Shrimp Lonsdale
sketch #342 Forest scene


anonymous
anonymous
sketch #5235


anonymous
anonymous
sketch #895


sketchmaster
sketch #2446 Joker by sketchmaster


Tom Kelly
sketch #4 Nirvana Smiley


anonymous
anonymous
sketch #4728 Angry Toad by Geneval Mendes


anonymous
anonymous
sketch #3554 Dr. House by Carrieann Benthem


anonymous
anonymous
sketch #4436 Bob Marley by Luiza Irma


anonymous
anonymous
sketch #5264


anonymous
anonymous
sketch #3617 D from Gorillaz by Joselyne Angel Gormaz


anonymous
anonymous
sketch #3769 The Beatles by يآآسر محمد


anonymous
anonymous
sketch #4319


anonymous
anonymous
sketch #20594


anonymous
anonymous
sketch #4987


anonymous
anonymous
sketch #5176


anonymous
anonymous
sketch #839


anonymous
anonymous
sketch #717


anonymous
anonymous
sketch #3000


anonymous
anonymous
sketch #2939 Eye by Kimmy Kitty Perry Priemus


anonymous
anonymous
sketch #5416

tomski如何用纯几何法证明共焦点椭圆、双曲线的这一光学性质? 知乎 coloring