This idea is not as outlandish as it sounds.这主意听上去荒诞不经，实际并非如此。You cannot refrain from fantastic reveries and are led into the mysterious and outlandish wonderland.情不自禁地遐想,误入神秘奇异的仙境.He wondered if the idea wasn't jus...
三角形的三个高共点.The 3 altitudes of a triangle are concurrent.建构一动态绘图:展示星状线共点的三切线.Construct an animation of three concurrent tangents of the astroid.圆上五点,其任四条辛姆森线会共点,可依次找出五点,这五点会共圆.Discover a theorem about the Simson line and f...