Common name: American cockroach Scientific name: Periplaneta americana Linnaeus Order: Blattaria. Description: This is one of the largest common cockroaches in Texas, reaching 1-1/2 to 2 inches.They are reddish-brown in color.ommon name: American cockroach Scientific name: Periplaneta americana Linnaeus Order: Blattaria. Description: This is one of the largest common cockroaches in Texas, reaching 1-1/2 to 2 inches.
If we have a parallelogram where all sides are congruent then we have what is called a rhombus. The properties of parallelograms can be applied on rhombi. If we have a quadrilateral where one pair and only one pair of sides are parallel then we have what is called a trapezoid.
A simple (non-self-intersecting) quadrilateral is a parallelogram if and only if any one of the following statements is true: 1  Two pairs of opposite sides are equal in length. 2  Two pairs of opposite angles are equal in measure. 3  The diagonals bisect each other. 4  One pair of opposite sides are parallel and equal in length.