Before revision: Triangular cactus upright=1.6|Friendship graphs are triangular cacti A triangular cactus is a special type of cactus graph such that each cycle has length three .
After revision: and each edge belongs to a cycleTriangular cactus upright=1.6|Friendship graphs are triangular cacti A triangular cactus is a special type of cactus graph such that each cycle has length three .