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.
Traditionally used on babies' bottoms and by older women, talcum powder is a soft, sweet-smelling way of keeping skin dry and avoiding rashes. Yet it may have more troubling effects. Research has been rumbling on for more than a decade, looking at whether the talc in talcum powder can cause cancer.