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 theseCells, Teepee, Office, Bamboo, Arcade, Icepack, Strawberry, Raccoon, Pottery, Mule, 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 #3145 Madoka by Николай Герасимов


anonymous
anonymous
sketch #3439 Aralé by Malyi Link


anonymous
anonymous
sketch #5018 Owl by Komlós László


anonymous
anonymous
sketch #1114 fire flame camping bonfire


Jocelyn Alejandra Rantul
sketch #2678 Portrait by Jocelyn Alejandra Rantul


anonymous
anonymous
sketch #3753


anonymous
anonymous
sketch #4751 Ruko by Rodrigo Marcos


anonymous
anonymous
sketch #5055


anonymous
anonymous
sketch #3133 Skrillex by Asfa Sajid


anonymous
anonymous
sketch #5314


anonymous
anonymous
sketch #3595


anonymous
anonymous
sketch #5416


Pascal Quéru
sketch #2479 C 'est qui ? Un rasta qui a manger trop de poulpe farcis. ? Un vieux chanteur de blue grass ? Najdica tomktoo ? A vous de me dire...


Fabio Sala
sketch #2672


anonymous
anonymous
sketch #5341 Rafael Nadal by Alina Danielle


anonymous
anonymous
sketch #3749 Girl Ari Rainbow


anonymous
anonymous
sketch #5112


anonymous
anonymous
sketch #5122


anonymous
anonymous
sketch #1255 something


anonymous
anonymous
sketch #3232


anonymous
anonymous
sketch #5068


anonymous
anonymous
sketch #4857 Eye by Thu Seba Piñeraa


anonymous
anonymous
sketch #3693 Lucy from Elfen Lied by Simona Honigmelone


anonymous
anonymous
sketch #5222 Magic Art Tin Sheek


sketchmaster
sketch #2620 goblin man


anonymous
anonymous
sketch #3118 Joker Hernan Da Costa Marquez


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


sketchmaster
sketch #2639 Marilyn by sketchmaster

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