Parallelogram and trapezoid
Compute the perimeter and area of a parallelogram (A = b·h) and a trapezoid (A = ((a+c)/2)·h). Classify a quadrilateral as a square, rectangle, rhombus, parallelogram or trapezoid.
Available exercises
Area of a parallelogram
Work out the area of a parallelogram from its base and height. Formula: A = b · h.
Perimeter of a parallelogram
Work out the perimeter of a parallelogram from two adjacent sides. Formula: P = 2 · (a + b).
Name the quadrilateral
Recognise and name the type of quadrilateral from the picture: square, rectangle, rhombus, parallelogram or trapezoid.
Area of a trapezoid
Work out the area of a trapezoid from its two parallel bases and the height. Formula: A = ((a + c) / 2) · h.
Perimeter of a trapezoid
Work out the perimeter of a trapezoid — add up all four sides.