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 » Math Geometry Shapes

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 »

The area of a trapezoid is found by multiplying the average length of the two parallel bases by the height, or 1/2 (b1 + b2) x h. The height is the length of a line connecting one base to the other at a 90-degree angle. More » Math Geometry Shapes

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 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 »

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 »