Parallelogram Area Calculator

A = base x height = 10 x 6 = 60 square units. The slant side length does not affect the area. Any parallelogram with base 10 and perpendicular height 6 has the same area regardless of how tilted it is.

The height (or altitude) is the perpendicular distance between the two parallel base sides. It is NOT the slant side. If the parallelogram is tilted at 60 degrees with a slant side of 7, the height is 7 x sin(60) = 6.06, not 7.

Use A = a x b x sin(theta), where a and b are adjacent sides and theta is the included angle. For sides 10 and 8 with angle 49 degrees: A = 10 x 8 x sin(49) = 80 x 0.7547 = 60.38 square units.

Yes. A rectangle is a parallelogram where all angles are 90 degrees. A rhombus is a parallelogram where all sides are equal. A square is both a rectangle and a rhombus. All four shapes use the same area formula.

Only if the perpendicular height changes. If you slide the top side horizontally (shearing) while keeping the base and height constant, the area stays the same. But if tilting reduces the perpendicular distance between parallel sides, the area decreases.

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