Material preparation: marker, paper.
1, the first step is to write the title of the handwritten newspaper in the middle of the white paper.
2. The second step is to draw a yellow title text border.
Step 3: Draw a sun stick figure in the upper left corner of the white paper, and then draw a cloud stick figure in the upper right corner.
4. Then the fourth step is to draw a picture about this area in the middle of the white paper, highlighting the theme.
5. After the fifth step, draw a stick figure in the left area.
6. The last step is to draw a stick figure with a circular area on the right, and you can write relevant knowledge in the blank.
Regional introduction:
1, area measurement and unit.
The area of a shape can be measured by comparing a fixed size shape with a square. In the International System of Units (SI), the standard unit area is square meters. A square area with an area of one meter and an area of three square meters will have the same shape as three such squares.
2. The concept of area.
Area is a quantity indicating the degree of a two-dimensional figure or shape or plane layer in a plane. A surface region is a simulation on a two-dimensional surface of a three-dimensional object. Area can be understood as the amount of material with a given thickness, which is necessary to form a shape model, or the amount of paint required to cover a surface with a single coating.
3. Area component in mathematics.
Region plays an important role in modern mathematics. Area is not only important in geometry and calculus, but also related to the definition of decisive factors in linear algebra, which is the basic feature of surfaces in differential geometry. In the analysis, Lebesgue measurement is used to define the area of a subset of planes, although not every subset is measurable.
4. Area calculation.
There are several well-known formulas for simple shapes, such as triangle, rectangle and circle. Using these formulas, you can find the area of any polygon by dividing it into triangles. For shapes with curved boundaries, calculus is usually needed to calculate the area. In fact, the problem of determining the digital area of aircraft is the main driving force for the historical development of calculus.
BBC natural spell enlightenment animation Alphablocks
Introduction: Alphablocks is a natural spelling enlightenment animation prod