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 theseTeepee, Pond, Diver, Zenith, Surfer, Radio, Diamond Ring, Treasure map, Puffin, Acrobat, 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?

Rachel Roe
sketch #2645 Flowers in window


anonymous
anonymous
sketch #921 comics ufo


sketchmaster
sketch #2636 Robitina by sketchmaster


anonymous
anonymous
sketch #4724 Turtwig by Mark Robson


anonymous
anonymous
sketch #5113 Growlithe and Arcanine by Kervinzitho del Piero


anonymous
anonymous
sketch #5227


anonymous
anonymous
sketch #690 barco


anonymous
anonymous
sketch #1536 Dark Night


anonymous
anonymous
sketch #5103


anonymous
anonymous
sketch #5071 Rihanna by Johan Kennet Espinoza Moreno


anonymous
anonymous
sketch #5311


anonymous
anonymous
sketch #2904 Pinky and the Brain by Tim Poole


anonymous
anonymous
sketch #3064


anonymous
anonymous
sketch #5027


anonymous
anonymous
sketch #894 hmmm


anonymous
anonymous
sketch #5223 Elsa from Frozen by Ben De Jesus


anonymous
anonymous
sketch #1221 səhər abbasova gözəi qız hamı məni çox seve anam da çox sevir


anonymous
anonymous
sketch #4778


Tom Kelly
sketch #12 my bear


anonymous
anonymous
sketch #3637


anonymous
anonymous
sketch #5327


anonymous
anonymous
sketch #3581 Dante


anonymous
anonymous
sketch #3670 Bugs Bunny by Jessica Column


anonymous
anonymous
sketch #4905 The Little Prince by Gaurav Patel


anonymous
anonymous
sketch #4087 Stewie by Leon Soria Ricardo


anonymous
anonymous
sketch #2892 Joker by Frank Aguiar Au

tomski如何优雅证明椭圆焦点三角形 pf₁f₂ 的面积等于 coloring