2 opposite acute angles and 2 opposite obtuse angles with opposite parallel sides
The choice of the base of a parallelogram does change the area because the base is always the bottom line of parallelogram.
No, it does not.
It does not. The perimeter of a parallelogram is a characteristic of the parallelogram. The orientation: which side is considered a base makes do difference whatsoever.
A parallelogram is identified as a rectangle if it has four right angles (90 degrees). Additionally, the diagonals of a rectangle are equal in length and bisect each other. If you can confirm that either of these conditions holds true in a parallelogram, you can conclude that it is a rectangle.
QT
All quadrilaterals have 4 sides; some are: kite, square, rhombus, rectangle, parallelogram, diamond, trapezoid
The choice of the base of a parallelogram does change the area because the base is always the bottom line of parallelogram.
No, it does not.
2
2
It does not. The perimeter of a parallelogram is a characteristic of the parallelogram. The orientation: which side is considered a base makes do difference whatsoever.
This can be a square or a rectangle.
yep
A parallelogram is identified as a rectangle if it has four right angles (90 degrees). Additionally, the diagonals of a rectangle are equal in length and bisect each other. If you can confirm that either of these conditions holds true in a parallelogram, you can conclude that it is a rectangle.
QT
Shapes that don't have 4 sides are not quadrilaterals
Shapes that don't have 4 sides are not quadrilaterals