如何优雅证明椭圆焦点三角形 Pf₁f₂ 的面积等于 B²tanα2? 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 theseSinger, Treasure map, Snake, Pizza, Alien, Lederhosen, Spear, Fiddler, Arcade, Campers, 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 #2989 Little Chibi by Loai Issa


anonymous
anonymous
sketch #933 mts


anonymous
anonymous
sketch #3039 Anonymous by Gootee Jaroonsit


anonymous
anonymous
sketch #21243


anonymous
anonymous
sketch #1562 Shaking red horse


anonymous
anonymous
sketch #5071 Rihanna by Johan Kennet Espinoza Moreno


anonymous
anonymous
sketch #2889


anonymous
anonymous
sketch #5288


anonymous
anonymous
sketch #5125


anonymous
anonymous
sketch #2554


anonymous
anonymous
sketch #1451 mi6softlab vibra


sketchmaster
sketch #2638 Cliff cool


anonymous
anonymous
sketch #270


Tom Kelly
sketch #521 A hungry caterpillar


anonymous
anonymous
sketch #1289 peace within


anonymous
anonymous
sketch #1453


Tom Kelly
sketch #645


anonymous
anonymous
sketch #2950 Miss Fortune from League of Legends by Araceli GM


anonymous
anonymous
sketch #4888


anonymous
anonymous
sketch #5079 SketchToy Pencil by Sarah Prieto


anonymous
anonymous
sketch #5351


anonymous
anonymous
sketch #2562


Helyryn
sketch #297 Fish


anonymous
anonymous
sketch #5231


anonymous
anonymous
sketch #3608 Skeleton king by Thania Arruda


Donara Smbatyan
sketch #1449 donara


anonymous
anonymous
sketch #3613


anonymous
anonymous
sketch #3667

tomski如何优雅证明椭圆焦点三角形 pf₁f₂ 的面积等于 coloring