Издательство: | Книга по требованию |
Дата выхода: | июль 2011 |
ISBN: | 978-6-1307-3547-0 |
Объём: | 72 страниц |
Масса: | 129 г |
Размеры(В x Ш x Т), см: | 23 x 16 x 1 |
In geometry a kite, or deltoid, is a quadrilateral with two disjoint pairs of congruent adjacent sides, in contrast to a parallelogram, where the congruent sides are opposite. The geometric object is named for the wind-blown, flying kite, which in its simple form often has this shape. Equivalently, a kite is a quadrilateral with an axis of symmetry along one of its diagonals. Any quadrilateral that has an axis of symmetry must be a kite or an isosceles trapezoid. Kites and isosceles trapezoids are dual: the polar figure of a kite is an isosceles trapezoid, and vice versa. A kite, as defined above, may be either convex or concave, but the word "kite" is often restricted to the convex variety. A concave kite is sometimes called a "dart" or "arrowhead", and is a type of pseudotriangle.
Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.