# Parallelogram Calculator and Solver

Easy to use online calculators to calculate the Area Ar, sides, diagonals, height and angles of a parallelogram. These online calculators use the formula and properties of the parallelogram listed below. Area Ar of a parallelogram may be calculated using different formulas.
Ar = b × h = a × b sin(A) = a × b sin(B)
height: h = a sin(B)
Diagonals BD and AC (using law of cosine)
AC2 = a2 + b2 - 2 a b cos(B)
BD2 = a2 + b2 - 2 a b cos(A) = a2 + b2 + 2 a b cos(B)
Internal angles
size of angle A = size of angle C , size of angle B = size of angle D
size of angle A + size of angle B = 180 ° (supplementary angles)

## 1 - Use Parallelogram Calculator Given sides a, b and angle A

Enter the sides a, b and angle A as positive real numbers and press "Calculate". The outputs are the area, the height, angle B and diagonals of the parallelogram.

 Side a = 20 Side b = 10 Angle A = 30 Decimal Places = 2 Area Ar = Height h = Angle B = Diagonal AC = Diagonal BD =

## 2 - Use Parallelogram Calculator Given sides a, b and height h

Enter the sides a, b and height h as positive real numbers and press "Calculate". The outputs are the area, angleA, angle B and diagonals of the parallelogram.

 Side a = 20 Side b = 10 Height h = 12 Decimal Places = 2 Area Ar = Angle A = Angle B = Diagonal AC = Diagonal BD =

## 3 - Use Parallelogram Calculator Given Area Ar, side a and height h

Enter the Area Ar, side a, and height h as positive real numbers and press "Calculate". The outputs are side b, angleA, angle B and diagonals of the parallelogram.

 Area Ar = 300 Side a = 30 Height h = 20 Decimal Places = 2 Side b = Angle A = Angle B = Diagonal AC = Diagonal BD =

## 4 - Use Parallelogram Calculator Given diagonals AC and BD and side a

Enter the the diagonals and side as positive real numbers and press "Calculate". The outputs are side b, angleA, angle B, Area Ar and height h of the parallelogram.

 Diagonal AC = 5.83 Diagonal BD = 7.62 Side a = 3.16 Decimal Places = 2 Side b = Area = Angle A = Angle B = Height h =