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.
A common application of magnesium silicate in its talc form is as talcum powder. This substance is used to make baby powder as well as the chalk powder used by athletes, such as gymnasts, to dry their hands for better grip. Talc can also be found in some types of chalk, ceramics, cosmetics, paint, and food products.