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 parallelogram is a quadrilateral. There are many different types of parallelograms. A rectangle, a square and a rhombus are all examples of parallelograms. The opposite angles of a parallelogram are always equal. Both pairs of opposite sides are also equal. Adjacent angles of a parallelogram always add up to 180 degrees. The sum of all four angles of a parallelogram is always 360 degrees. A hexagon has six equal sides and six equal angles. Each angle of a hexagon is 120 degrees, and the sum of all six angles is 720 degrees.