A rectangle is a simple shape that is characterized by having four sides at 90-degree angles to each other, and having both sets of opposing sides be the same length. Note that if all sides are equal to each other, the shape is not a rectangle, but a square.
Continue ReadingA rectangle is one of the most common four sided two-dimensional shapes. It has both a length and a width dimension. Other four-sided shapes include squares, parallelograms and rhombuses. The area of a rectangle can be calculated by multiplying the length by the width while the perimeter can be calculated by adding up all the side lengths.
Learn more about GeometryA rhombus has exactly four sides and has a diamond shape. All the sides of a rhombus are the same length, and its opposite sides are parallel to each other. The difference between a rhombus and a square is that the angles in a rhombus cannot be 90 degrees.
Full Answer >To find the perimeter of a trapezoid, add up the length of each of the sides of the shape. Use the equation P = a + b + c + d.
Full Answer >Any shape that has four sides at right angles to each other with diagonals of equal length is a rectangle. The two special types of rectangles are squares and Fibonacci rectangles.
Full Answer >Four different methods for determining triangle congruency by examining sets of sides and angles exist: SSS (side, side, side), SAS (side, angle, side), ASA (angle, side, angle) and AAS (angle, angle, side). The hypotenuse and leg method can also determine the congruency of right triangles.
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