The avian cardiovascular system is able to quickly respond to changes in levels of activity (e.g., resting vs. flying) via changes in heart rate, cardiac output, & blood flow (by vasocontriction and vasodilation of vessels).
A square is a quadrilateral with all right angles and all equal sides. A square is also a parallelogram, a rectangle, and a rhombus and has all the properties of all these special quadrilaterals. Figure 3 shows a square. Figure 3 A square has four right angles and four equal sides. Figure 4 summarizes the relationships of these quadrilaterals to one another.
TopParallelogram is defined as a type of quadrilateral having four sides, its opposite sides are equal and parallel to each other. Corresponding opposite angles is also equal to each other. Any Parallelogram is divided into two congruent Triangles by each of its diagonal. In a parallelogram, the sum of squares of diagonals is equal to sum of squares of sides. Here a question arises that does a parallelogram have Rotational Symmetry? The answer to this question is yes, a parallelogram possesses rotational symmetry. It provides a same view after its rotation also. Adjacent angles of any parallelogram are supplementary that is their sum is 180 0. There are four types of parallelogram, as follows: Square: A Square is defined as a parallelogram whose all four sides is equal and opposite sides are parallel. Rectangle: A Rectangle is defined as a parallelogram whose opposite sides are equal and parallel. Rhombus: A Rhombus is defined as a type of parallelogram whose four sides are equal in length.