为什么椭圆内中点弦和等比例缩放后的椭圆(离心率一致)相切且切点是原中点? 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 theseParallelogram, Timer, Library, Ocean, Unicycle, Rug, Adz, Throat, Teepee, Cucumber, 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?

Rachel Roe
sketch #78 Dino-Roar


anonymous
anonymous
sketch #5058


anonymous
anonymous
sketch #22


anonymous
anonymous
sketch #3166 Axl Rose by Jessie Lightwood


anonymous
anonymous
sketch #4774 Banksy&#;s Wall and Piece by Ameli Cedeño Barcia


anonymous
anonymous
sketch #5055


Helyryn
sketch #308


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


anonymous
anonymous
sketch #4965


anonymous
anonymous
sketch #5351


anonymous
anonymous
sketch #4939 Zelda by Jeanie Wagenknecht


anonymous
anonymous
sketch #3388 Fight Club by Alvaro Velasquez


anonymous
anonymous
sketch #1045


anonymous
anonymous
sketch #4933 Tobi by Abdelwahab Haik


anonymous
anonymous
sketch #4273


anonymous
anonymous
sketch #3083 Great illustration Ali Hänel


anonymous
anonymous
sketch #5037 Dolphin by Meen Suksoi


anonymous
anonymous
sketch #3510 Edward from FMA by Raman Chauhan


anonymous
anonymous
sketch #5312


sketchmaster
sketch #2593 Tweety by sketchmaster


anonymous
anonymous
sketch #1519


anonymous
anonymous
sketch #5151


anonymous
anonymous
sketch #3554 Dr. House by Carrieann Benthem


anonymous
anonymous
sketch #5180


Tom Kelly
sketch #124 saurez


anonymous
anonymous
sketch #3222 Late happy valentine&#;s from Tiffa Hidalgo Jordan Coquet


anonymous
anonymous
sketch #3599 Lovely pencil face

tomski为什么椭圆内中点弦和等比例缩放后的椭圆(离心率一致)相切且切点是原中点? 知乎 coloring