请问如何用旦德林双球证明抛物线是圆锥曲线? 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 theseOveralls, Purse handbag, River, Billy Goat, Vardo, Walrus, Moon, Pie, Chair, Carrots, 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 #4766 The Little Mermaid by Zizou Aiman


anonymous
anonymous
sketch #5313 Katy Perry by Monalisa Theresia


anonymous
anonymous
sketch #4796


anonymous
anonymous
sketch #4722 Ichigo by Gopal Gopi


Rachel Christa Ibarrientos
sketch #3897 dolphins playing over the sea


anonymous
anonymous
sketch #5177


anonymous
anonymous
sketch #2309


Fabio Sala
sketch #2672


anonymous
anonymous
sketch #5303


anonymous
anonymous
sketch #3280 Adventure Time by Alina Danielle


anonymous
anonymous
sketch #4704 Slash


anonymous
anonymous
sketch #4929


anonymous
anonymous
sketch #3707 The Thinker


anonymous
anonymous
sketch #1474


anonymous
anonymous
sketch #4883 White tiger by Kayson Danielle


anonymous
anonymous
sketch #303


anonymous
anonymous
sketch #4414


anonymous
anonymous
sketch #937


anonymous
anonymous
sketch #4708 Katekyo Hitman Reborn by Mário JBudo


anonymous
anonymous
sketch #5156 Angry Bird by Roberto Castro Colimil


Rachel Roe
sketch #672 Snails pace


anonymous
anonymous
sketch #3572 Hate mondays by Malyi Link


anonymous
anonymous
sketch #3350 Gerard Way by Carrieann Benthem


anonymous
anonymous
sketch #3505 Django


anonymous
anonymous
sketch #2577


anonymous
anonymous
sketch #5139 Sick Sick Six Urs Stefan


anonymous
anonymous
sketch #3088 Billy from Saw by Naulian Ciko


anonymous
anonymous
sketch #3444 PSY by Melodee Ripepi


Loai Issa
sketch #2668 Butterfly by Loai Issa


anonymous
anonymous
sketch #3260 sorry to over comment on your blog .haha. I 'm just flnpiipg through your posts after finding you through the KCWC. Recently I had this huge urge to learn to sketch with black ink pens. This cloud drawing is exactly the thing that I feel the need to put on paper. : )

tomski请问如何用旦德林双球证明抛物线是圆锥曲线? 知乎 coloring