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 theseYacht, Railroad, Toilet, Lizard, Cruise ship, Hedge, Whippet, Elf, Sumo wrestler, Hitchhiker, 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 #4903 Naruto & Kurama by Fatér Szilvia


Ashok Kumar Chaturvedi
sketch #2699 Girl in shades Ashok Kumar Chaturvedi


anonymous
anonymous
sketch #953


anonymous
anonymous
sketch #5176


anonymous
anonymous
sketch #2318


anonymous
anonymous
sketch #5416


Szabó Zoltán
sketch #2828 One Direction Szabó Zoltán


anonymous
anonymous
sketch #5020 Stitch by Hina Ali


anonymous
anonymous
sketch #5071 Rihanna by Johan Kennet Espinoza Moreno


anonymous
anonymous
sketch #214 bugs bunny


anonymous
anonymous
sketch #4975 Orange by Marcos Roberto Molina


anonymous
anonymous
sketch #5087


anonymous
anonymous
sketch #3604 Falling Manipati Surya


anonymous
anonymous
sketch #5217


anonymous
anonymous
sketch #5229


anonymous
anonymous
sketch #690 barco


anonymous
anonymous
sketch #3626 Skream by Wellen Lima


anonymous
anonymous
sketch #5139 Sick Sick Six Urs Stefan


anonymous
anonymous
sketch #3489 Panda by Scott Terry


anonymous
anonymous
sketch #5279


anonymous
anonymous
sketch #3431 Jimi Hendrix by Konvicted Rohit


anonymous
anonymous
sketch #2309


Helyryn
sketch #308


anonymous
anonymous
sketch #2982 Lion by Ati Gohary


anonymous
anonymous
sketch #3699 Dragon by Ana Cecilia


anonymous
anonymous
sketch #3680 Infected Mushroom by Rohit Rahul


anonymous
anonymous
sketch #2150 batman


anonymous
anonymous
sketch #2922


anonymous
anonymous
sketch #4970

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