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.
Although some condom manufacturers still use talc as a dry lubricant, others use dry lubricants such as silicone and cornstarch. The harmful effects of talc on human tissue were first recorded in the 1930s. Thirty years later there was a reported case of a woman who had a significant amount of talc in her peritoneal (abdominal) cavity talc which matched that found on the surface of her husband's condoms (Lancet, 1963; 1: 1295-6).