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 theseZenith, Kids, Ribbons, Beets, Lettuce, Musk ox, Lasagna, Bison, Synagogue, Queen, 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?

Tom Kelly
sketch #4 Nirvana Smiley


anonymous
anonymous
sketch #2250 lelouch


anonymous
anonymous
sketch #3344 Homer by Samuel Roberto


Mirnes Sinanovic
sketch #2640 Marge by Mirnes Sinanovic


anonymous
anonymous
sketch #1899 blue


anonymous
anonymous
sketch #5341 Rafael Nadal by Alina Danielle


anonymous
anonymous
sketch #3508 Medusa by Nelly Panambo


anonymous
anonymous
sketch #1082 Seher 6 years


anonymous
anonymous
sketch #4558


anonymous
anonymous
sketch #2062


sketchmaster
sketch #2613


anonymous
anonymous
sketch #312


anonymous
anonymous
sketch #600


anonymous
anonymous
sketch #5095 Lion by Frederic Knauer


anonymous
anonymous
sketch #4895 Cat by Gaurav Patel


Saifa Mahmud
sketch #1671


anonymous
anonymous
sketch #3506 Goku by Saul Mansanares


anonymous
anonymous
sketch #5218 Marshall Lee Dj-ionut Manelomania


anonymous
anonymous
sketch #20344


anonymous
anonymous
sketch #5199 Catface by Noeli Racioppo


anonymous
anonymous
sketch #3381 DBZ by Adidtzu Ady


anonymous
anonymous
sketch #1668 SUNSET


anonymous
anonymous
sketch #5225 The Friendship by Annabelle Bourget


anonymous
anonymous
sketch #5136


anonymous
anonymous
sketch #5009 Elen Jager from Attack on Titan


anonymous
anonymous
sketch #20840 Dog by Laur Ūūtiis


anonymous
anonymous
sketch #4190


anonymous
anonymous
sketch #5307


anonymous
anonymous
sketch #3505 Django

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