Rolling and learning with Tri-Square Dice (ENC-012306) This set of games, created for players PreK to adult, consists of a 14-sided die and a book of 66 math and learning games designed around everyday activities. The uniquely shaped die has six equal squares and eight equal triangles. Through the games, players practice skills in geography, banking, telling time, fractions, sports, and weights and measures. The purpose is to help players feel comfortable using numbers.