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.
Talcum Powder. Often referred to as  talc , it is a mineral composed of hydrated magnesium silicate in the loose form. Interestingly it is used in many industries, including electrical switchboards, due to its resistance to heat.his is a powder using talc or cornstarch and contains calamine, which is a combination of zinc oxide and iron oxide. It has mild antipruritic (anti-itching agent), antiseptic and astringent properties. On a positive note, at least one cyclist has had a positive experience with every item on this list.