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.
A parallelogram is a quadrilateral in which both pairs of opposite sides are parallel. An additional property of a parallelogram is that both pairs of opposite sides are congruent. Note: Similar arrow markings indicate that the sides are parallel.xample 4.1 â Uses properties to identify, describe, classify, and distinguish among quadrilaterals: Quadrilateral is the âfamilyâ name given to closed four-sided shapes. A rectangle is a special type of quadrilateral because it has four right angles and two pairs of parallel sides.