1927 18th(a) kä cuɛ tekɛ polyhedron mi̱ cu nhɔk ni̱ anisohydral kärɔa mi̱ kuɛɛni̱ mi̱ te guɔ̱kdiɔ̱k(three dimensions)? (b) Kä cuɛ mi̱ te di̱ naŋ kɛ tɔ̱a̱w  I̱thi̱pi̱er(sphere)?