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 theseChurch, Sleepyhead, Smoke, Noose, Telescope, Lathe, Shrubbery, Cat burglar, Lunch, Waiter waitress, 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 #5361 Emma Watson by Glynis June Williams


anonymous
anonymous
sketch #2977 Spongebob Germaine Hoens


anonymous
anonymous
sketch #4829


Rachel Roe
sketch #673 Peachy mouse


anonymous
anonymous
sketch #3337 Uryuu Minene by Michael Angcay


anonymous
anonymous
sketch #5054 Angelina Jolie by Hailey So Pretty


anonymous
anonymous
sketch #303


anonymous
anonymous
sketch #4385


sketchmaster
sketch #2446 Joker by sketchmaster


anonymous
anonymous
sketch #3058 Marilyn Monroe by Adam Pyszny


sketchmaster
sketch #2618


anonymous
anonymous
sketch #5230


anonymous
anonymous
sketch #4546 Misaki Mei by Wanis Khelifa


anonymous
anonymous
sketch #3174 John Snow Helga Fon Stein


anonymous
anonymous
sketch #4945


anonymous
anonymous
sketch #5263


Donara Smbatyan
sketch #1551 donara


anonymous
anonymous
sketch #3662 Angel by Alexander Volodimirovich Danilchenko


anonymous
anonymous
sketch #5119


anonymous
anonymous
sketch #4867 Johnny Depp Ronin Ronin


anonymous
anonymous
sketch #5278 Cosmos by Jenna Khoùlix�


anonymous
anonymous
sketch #1732


anonymous
anonymous
sketch #5018 Owl by Komlós László


anonymous
anonymous
sketch #1562 Shaking red horse


anonymous
anonymous
sketch #1545


anonymous
anonymous
sketch #5346


anonymous
anonymous
sketch #5232 Avril by Teresa Temacha


anonymous
anonymous
sketch #5061

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