The term TRIANGLE PART can be broken down into two crossword solutions: LEG (3 letters) and SIDE (4 letters). A triangle is a three-sided polygon, with each SIDE being connected to the other two sides. Each of these sides is referred to as a LEG, while the entire shape is referred to as a SIDE. Therefore, the two crossword solutions for TRIANGLE PART are referring to the individual parts that make up a triangle.