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.
In nature talc does not exist in itsâ theoretical form or purity, but a small fraction of Mg and Si atoms can be replaced by iron (Fe), aluminium (Al) or nickel (Ni). Typically, the colour of talc stones is pale green or white, but the colour can vary from pinkish to dark green. The surface of talc stone has slippery feeling and pearly lustre. The unique fine structure of talc makes it ideal filler for protective coatings: Talcâs surface is electrically neutral, which makes talc highly hydrophobic, thus water.repellent. Talcâs particle form is platy, which is important for an optimum filler packing in the paint film. The platy particles also create a.good.barrier against