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.
No. A quadrilateral is simply a 4 sided polygon. There are 2 special subsets of polygons. The first is a trapezoid, which has 1 pair of opposite sides being parallel. If the other two pairs of base angles and opposite sides are congruent, then the trapezoid is isosceles. The four sides in a trapezoid are NEVER congruent. The other special subset of quadrilaterals is parallelograms. A parallelogram has opposite sides being both congruent and parallel. Opposite angles are also congruent and consecutive angles are supplementary (= 180). Subsets of parallelograms are rectangles, where all the angles are right angles (=90) and rhombuses, which DO have all 4 sides being congruent. A special quadrilateral that is BOTH a rhombus and a rectangle is the square. In short, only squares and rhombuses have 4 congruent sides. The rest do not.