Current location - Training Enrollment Network - Mathematics courses - Tsinghua, Peking University, and other five schools jointly took an examination of a math problem of three-dimensional geometry in senior high school. Beg the math emperor!
Tsinghua, Peking University, and other five schools jointly took an examination of a math problem of three-dimensional geometry in senior high school. Beg the math emperor!
AC line, PABC and PADC are triangular pyramids with equal volumes, that is, each volume = 1/2P-ABCD.

A-B 1CB and A-D 1CD have the same bottom area and the same height, so they have the same volume.

A-B 1CB and PABC have the same bottom area, which is half as high, so the volume = 1/2 ABC.

That is, the volume ratio of each of the two cones to the original regular four cones is 1:4.