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#1)The opposite sides of it are always parallel which is to say that they will never intersect.
#2)Its area must be twice the area of a triangle created by one of its diagonals.
#3)Its area is also equal to the magnitude of the vector cross product of two adjacent sides.
#4)Its perimeter of a parallelogram is 2(a + b) where a and b must be the lengths of adjacent sides.
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How many right angles does a parallelogram?
A parallelogram doesn't need any right angles in order to be a parallelogram.If it has any, then it's a special kind of parallelogram, called a "rectangle".Note:The way the properties of a parallelogram work out,if it has one right angle, then it has four of them.
Is an isosceles trapezoid a parallelogram?
No, but they are both 4 sided quadrilaterals.
Why do all of the properties of a parallelogram apply to the rectangles?
Because a rectangle is a parallelogram.
How many angles does a parallelogram have?
A parallelogram has four interior angles that add up to 360 degrees
A parallelogram that has four congruent sides?
A parallelogram with four congruent sides may be either a square or a rhombus.
