sewn channels hold the down in place while eliminating cold spots Much less bulk than offset quilting Although expensive, this method provides the ultimate warmth without excess weight
A trapezoid is a quadrilateral with at least 2 opposite sides parallel: If you cut off the top of a triangle parallel with it's base, you will have a trapezoid A square is a special type of trapezoid
A quadrilateral with exactly one pair of parallel sides The parallel sides are called bases A pair of angles that share a base as a common side are called a pair of base angles (Lesson 2 7)
A trapezoid is a quadrilateral with exactly one pair of opposite sides parallel The parallel sides are called bases, and the nonparallel sides are the legs If the legs are equal, the trapezoid is called an isosceles trapezoid