An isosceles triangle is a triangle with two congruent sides and congruent base angles. congruent means equal. No matter which direction the triangle's apex, or peak, points, it's an isosceles triangle if two of its sides are congruent.
Uses of talc: Talc is used in a wide variety of products that we see every day. It is an important ingredient in rubber, a filler and whitener in paint, a filler and brightening agent in high-quality papers, and a primary ingredient in many types of cosmetics.
Talc, hydrous magnesium silicate, is a soft mineral used in food, drugs, cosmetics and industrial applications. Cosmetic-grade talc is produced so that it conforms to United States Pharmacopeia (USP) and industry specifications.