1. Make two small squares into a rectangle.
2. Put the other two small squares together into a rectangle.
Put these two rectangles together and you can get a big square.
This method is based on mathematical proof and can be proved by theorems in plane geometry. If the sides of four small squares are A, then the sides of the big square are 2a.
I hope this method can help you!
A quadrilateral is a figure with four sides and four corners. It has some special properties and mysteries. Here are some secrets about quadrangles:
1. sum of internal angles: the sum of internal angles of a quadrilateral is 360 degrees. In other words, the sum of the degrees of the four internal angles is 360 degrees.
2. Diagonal intersection: The diagonal of a quadrilateral is a line segment connecting non-adjacent vertices. The secret is that the diagonal intersection of quadrilateral can divide four angles into two groups, and the angles of each group are complementary (the sum is 180 degrees).
3. Parallel edge property: If the opposite sides of a quadrilateral are parallel, then it is a parallelogram. Parallelogram has some special properties, such as equal length of opposite sides and complementary internal angles.
4. The nature of rectangle: rectangle is a special quadrilateral, which has four right angles (90 degrees), the opposite sides are equal and the diagonal lines are equal. The secret of a rectangle is that its diagonal lines are equal, which means that a rectangle can be determined by the length of the diagonal lines.
5. Area of parallelogram: The area of parallelogram can be calculated by the product of the length and height of the base. The secret is that the area of parallelogram can be calculated by simple formula without knowing the length of each side.
These are just some secrets and properties of quadrangles. In fact, there are many other special quadrangles and related theorems. Exploring the essence and mystery of quadrilateral can help us understand the geometric world more deeply.