The properties of a trapezium are that it has four sides, none of which are parallel; the sum of its angles equals 360 degrees; and any three sides are greater than the fourth. A trapezium is a quadrilateral, meaning it ... More »

The sum of the interior angles of an equilateral triangle equals 180 degrees. This stems from the fact that the combined interior angles of any given triangle always add up to this same amount, according to the Monterey ... More »

A triangle is a three-sided polygon where the sum of its interior angles equals 180 degrees. Some common formulas for triangles include perimeter, the total sum of its individual side lengths; area, one-half of the produ... More »

The degrees of a polygon, or the sum of its angles, depends on the number of sides the polygon has. The sum of the degrees of the angles of a polygon equals 180(n-2), where n equals the number of sides of the polygon. More »

Some properties of a rhombus are that its four sides are congruent, the opposite angles have equal measurements, the diagonals bisect each other and form 90 degrees at their intersection and the angles on an adjacent sid... More »

A trapezoid, also referred to as a trapezium, is a quadrilateral shape with a pair of parallel opposite sides. The two parallel lines are called the bases, while the nonparallel sides are called the legs. More »

A trapezium is a quadrilateral that consists of four sides that are not parallel. If one pair of these sides were parallel, it would be called a trapezoid. If both pairs were parallel, it would be a parallelogram. More »