Parallelogram Calculator
Area
—
Perimeter
—
Height
—
Diagonals
—
Parallelogram Properties
A = a*b*sin(theta). At 90 degrees it becomes a rectangle. Perimeter = 2(a+b).
Diagonals bisect each other. d1 = sqrt(a^2+b^2+2ab*cos(theta)), d2 = sqrt(a^2+b^2-2ab*cos(theta)).
Fundamental in physics (parallelogram law of forces) and crystallography.
Frequently Asked Questions
Area formula?
A = base x height = a*b*sin(theta). At 90 degrees becomes a*b (rectangle).
Find the height?
h = b*sin(theta). Perpendicular distance between parallel sides.
Parallelogram law?
d1^2 + d2^2 = 2(a^2 + b^2). Used in physics for vector addition.
Is a rectangle a parallelogram?
Yes. Rectangle has all 90-degree angles. Square is a special rectangle with equal sides.