3x^2 2xy 3y^2=1为什么是个椭圆�?感觉并化不成椭圆的标准方程。? 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 theseHourglass, Quill, Outhouse, Crab trap, Restaurant, Chimes, Trigger, Noodles, Jester, Liverwurst, 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 #5059 Edward Hopper&#;s &#;Nighthawks&#; by Rosanne Zammit


anonymous
anonymous
sketch #5080 Megaman Zero (X) by Muhammad Raiyaan


anonymous
anonymous
sketch #2022


anonymous
anonymous
sketch #3155 Iron Man


Mirnes Sinanovic
sketch #2640 Marge by Mirnes Sinanovic


anonymous
anonymous
sketch #5347


anonymous
anonymous
sketch #5055


anonymous
anonymous
sketch #270


Lucy Barnard
sketch #249 Rocket


anonymous
anonymous
sketch #3999 Deadmau by Speeð Üp Säm


anonymous
anonymous
sketch #5346


anonymous
anonymous
sketch #314 Butterfly


anonymous
anonymous
sketch #1545


anonymous
anonymous
sketch #3626 Skream by Wellen Lima


anonymous
anonymous
sketch #3259


anonymous
anonymous
sketch #4948 Snow White by George Lucaz


anonymous
anonymous
sketch #4653 Kero by Indike Liyanage


anonymous
anonymous
sketch #2965 Flapjack by Farzin Hedayatzadeh


anonymous
anonymous
sketch #5316


anonymous
anonymous
sketch #4972


sketchmaster
sketch #2639 Marilyn by sketchmaster


anonymous
anonymous
sketch #474 waa


anonymous
anonymous
sketch #5267


anonymous
anonymous
sketch #5308 Taylor Swift by Gabi Ferrari


anonymous
anonymous
sketch #5204


Nemo Archt
sketch #4134 1 min sketch


anonymous
anonymous
sketch #5368


anonymous
anonymous
sketch #4749 Random Girl by Adellachamp Stand


anonymous
anonymous
sketch #5221


anonymous
anonymous
sketch #1219

tomski3x^2 2xy 3y^2=1为什么是个椭圆�?感觉并化不成椭圆的标准方程。? coloring