Area of a rectangle is base x height or length x width

3 x 2 = 6 sq. cm

​These are parallelograms:

2 pair of parallel lines.

​These arrows mean the lines are parallel.

​These dashes mean the lines

are the same length.​

​The area for a parallelogram is

base x height​

Triangles

1/2 b x h

​We don't need one of these measurements. Which one?

​The height of a shape is ALWAYS perpendicular to its base.

​base

​height

​This triangle and this rectangle have the same base & height. That is why you must divide by 2 for the area of a triangle.