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 schist is used in ceramic glazes. Mica schist can be used to make vermiculite, a common component of potting soil. Greenish schist slabs â perhaps chlorite schist â were found by archeologists to have been used for roofing in the Bronze Age.