Final answer:
The parts of an isosceles triangle include its legs, base, base angles, and vertex angle. These terms relate to sides and angles that define the properties of an isosceles triangle in geometry.
Step-by-step explanation:
The question relates to the mathematics subject, specifically focused on the geometry of an isosceles triangle. An isosceles triangle is a triangle with at least two sides of equal length, referred to as the legs, and it also includes a base, which is the unequal side if any. The two angles adjacent to the base are called base angles, and they are equal in measure. The angle opposite to the base is known as the vertex angle. When naming parts of an isosceles triangle using a word list, it is crucial to identify the appropriate geometric terms matched to their definitions.