Is height the same as the slanted side length?

No, height must be the perpendicular distance between the base and its opposite side, not the length of the slanted side — using the slanted side would overstate the area.

Does this work for a rectangle too?

Yes, a rectangle is a parallelogram where the height equals the side length, so the same base × height formula applies.

Parallelogram Area Calculator

Calculate a parallelogram's area using its base length and perpendicular height. This applies to any parallelogram, including rectangles, rhombi, and general slanted quadrilaterals with two pairs of parallel sides.

Inputs

Results

Area: 60 square units

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Formula

Area = base × height

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