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 is used to make baby powder (and talcum powder)   Talc is a hydrous silicate mineral composed of magnesium (Mg), silicon and oxygen (SiO2, silica), and water. It â¦ s chemical formula is Mg3Si4O10(OH)2.