It is found that as long as a figure consisting of 10 small squares is drawn, the area of the figure is equal to the area of the parallelogram. You can also draw at the bottom or the same height.

This topic comes from the second volume of the sixth grade of Mathematics People's Education Edition, The Perimeter and Area of Plane Graphics.

Extended data

"Review Course of Perimeter and Area of Plane Graphics" The area of plane graphics with equal perimeter is not necessarily equal, and the perimeter with equal area is not necessarily equal.

The area of a rectangle = length × width, which is represented by letters as S=ab.

The area of a square = side length × side length, expressed in letters as S=a2.

The area of parallelogram = base length × height, expressed in letters as S=ah.

The area of the triangle = base length × height ÷2, expressed in letters as S=ah÷2.

The area of the trapezoid = (upper base length+lower base length) × height ÷2, expressed in letters as S=(a+b)? h \u 2

The area of a circle = π× radius× radius, which is expressed in letters as S=πr2.