A regular tetrahedron with edges of length 6cm has each corner cut off to produce the solid shown. The triangular faces are all equilateral triangles, but not necessarily all the same size. What is the total length of the edges of the resulting solid?
Sign in or create an account to reveal answers, view the solution, and save your progress. Create a free account to unlock practice and keep track of your work.
Intermediate Mathematical Challenge 2001 (2001)
One puzzle per day. Cryptarithm, Magic Square, Summit. No sign-up required to play.
Play daily puzzle →Interactive problems and curated lessons—water pouring, magic squares, knight's tour, and more.
Browse library →See how you rank. Top solvers by problems solved correctly. Sign in to climb the ranks.
View leaderboard →Intermediate Mathematical Challenge 2001 (2001)