There are many different types of quadrilaterals: squares, rectangles, rhombuses, trapezoids, parallelograms and kites. A quadrilateral defined as a closed shape (polygon) that consists of exactly four straight lines.
Know MoreThere are only three properties that every quadrilateral shares. They must all have four sides, four vertices and four internal angles with a total sum of 360 degrees.
The simplest type of quadrilateral is the square. A square can be any size, but all of its sides must be the same length, and both sets of opposite sides must be parallel to each other. The internal angles must also be exactly 90 degrees.
A rectangle is similar to a square in that opposite sides are parallel and equal in length to each other, but not all sides must be the same shape. A square fulfills all these conditions and is a special type of rectangle.
The rhombus shares almost all the properties of a square, with four equal sides and parallel opposite sides. However, while opposite angles need to be equal, angles do not need to be 90 degrees.
Trapezoids and kites are two quadrilaterals where the opposite sides do not need to be parallel. They are the most general quadrilaterals, and every other quadrilateral fits the definition for either a trapezoid or kite.
Learn more about ShapesFind the perimeter of a rhombus by taking half of each diagonal, summing their squares, square-rooting the result and finally multiplying by four. This method is derived from using the Pythagorean Theorem on one of the right triangles created by the diagonals in order to determine the length of one side. Since the sides of a rhombus are equal in length, multiplying that side by four equals the rhombus' perimeter.
Full Answer >All squares are rectangles, but not all rectangles are squares. The definition of a rectangle is a shape that has four sides and four 90-degree internal angles, which is also true of all squares.
Full Answer >Some commonly-known shapes are squares, circles, triangles, stars and rectangles. There are many different kinds of polygons used in geometry and many shapes that combine or arrange multiple polygons to be used in designs.
Full Answer >A wedge is a type of simple machine that is a variation of another simple machine, the inclined plane, which makes it easier to move something to a higher or lower location. However, wedges, made from two inclined planes, are used to cause separations. Shovels, scissors, axes, pick axes, saws and ice picks are all examples of wedges that push things apart.
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