For fabric at least 10 cm wider than half the chest measurement, 2 lengths + 1 sleeve length + 100 cm. For fabric at least 10 cm wider than 1/4 chest measurement: 4 lengths + 1 sleeve length + 200 cm. These are rough estimates and should give you plenty of fabric for a basic shirt or blouse. Add more for gathering, design features like bias cuts, pleats, etc.
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.
Different Types of Triangles. The different types of triangles are grouped by either their angles, lines or both. For example and equilateral triangle is a triangle whose SIDES are equal. A right triangle has one angle that is 90 degrees, also known as a right angle. An Isosceles triangle is a triangle which has two sides equal in length. But you can also have a Right Isosceles triangle.