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 the softest mineral on Earth. In addition to beauty and body care, talc is also used in toothpaste, chewing gum, aspirin and many other consumer products. The use of talc in beauty and body care dates all the way back to ancient Egypt.