过焦点弦端点的切线互相垂直并且交点在准线上,这个要怎么证明? 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, Garden, Poodle, Crackpot, Store, Bed, Skater, Shuffleboard, Crossbow, Kissing, 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 #4987


anonymous
anonymous
sketch #2308


anonymous
anonymous
sketch #4546 Misaki Mei by Wanis Khelifa


anonymous
anonymous
sketch #3042 Tobi by Mirnes Sinanovic


anonymous
anonymous
sketch #4975 Orange by Marcos Roberto Molina


anonymous
anonymous
sketch #20471


anonymous
anonymous
sketch #3375


anonymous
anonymous
sketch #5208 Alf by David Rossien


anonymous
anonymous
sketch #5276


anonymous
anonymous
sketch #2969


anonymous
anonymous
sketch #4300 República, comunismo, libertad


anonymous
anonymous
sketch #3197 Dragon by Yuryi Zambrano


anonymous
anonymous
sketch #3236 Sunset by Aaron Bahary


anonymous
anonymous
sketch #4933 Tobi by Abdelwahab Haik


anonymous
anonymous
sketch #1153 sahib


Raisa Mahmud
sketch #2058


anonymous
anonymous
sketch #4467


anonymous
anonymous
sketch #2283 Head in a shoe


anonymous
anonymous
sketch #4934 Nami-Ki Roberto Castro Colimil


anonymous
anonymous
sketch #5250


Donara Smbatyan
sketch #1504 donara


Jay Lantz
sketch #3743 Just for fun


anonymous
anonymous
sketch #5135 &#;Hypno Colorfull&#; by Lars Tunebo


anonymous
anonymous
sketch #4939 Zelda by Jeanie Wagenknecht


anonymous
anonymous
sketch #3818 เดียวจะวาดใหม่ยังไม่เสร็จๆ


anonymous
anonymous
sketch #4876 Luffy by Nycole Prietsch


anonymous
anonymous
sketch #3686 Toy Story by Thania Arruda


anonymous
anonymous
sketch #68512

tomski过焦点弦端点的切线互相垂直并且交点在准线上,这个要怎么证明? 知乎 coloring