Base and perpendicular height
Base b + Height h
A = bh
Open calculator ↗GEOMETRY, ONE FIGURE AT A TIMEParallelogram.
Parallelogram.
Understand every measure.
Tilt the sides, keep the structure. Four free tools, clear formulas and a little discovery along the way.
Find your calculator ↗FIGURE 092D / REFERENCE DRAWING
PARALLELOGRAMNOT TO SCALE
THE CALCULATOR DESK
Start with what you know.
4 calculators available
Sides and included angle
Side a + Side b + Included angle θ
A = ab sin θ; P = 2(a+b)
Open calculator ↗Diagonals and crossing angle
Diagonal p + Diagonal q + Crossing angle θ
A = pq sin θ/2
Open calculator ↗Area to perpendicular height
Area A + Base b
h = A/b
Open calculator ↗MEET THE FIGURE
A parallelogram, explained.
A parallelogram is a quadrilateral with both pairs of opposite sides parallel. Opposite sides and opposite angles are equal. Rectangles, rhombi and squares are special cases.
Understand the properties ↗LOOK A LITTLE CLOSER
More than a formula.
A diagonal splits it into two congruent triangles.
A sloping side is not generally the height. Base and height alone do not determine perimeter.
Explore three geometry facts ↗These tools use ideal Euclidean geometry. Every input must use the same unit. Numerical results are rounded and do not replace measurement, specialist design or safety checks. See worked examples.