2. Square area = side length × side length, and the calculation formula is S=a×a=a2.
3. The circumference of a rectangle = (length+width) ×2, and the calculation formula C=(a+b)×2.
4. Square perimeter = side length ×4, and the calculation formula is C=4a.
5. parallelogram area = base × height, and the calculation formula is S=ah.
6. Triangle area = base × height ÷2, and the calculation formula is S=a×h÷2.
7. Trapezoidal area = (upper bottom+lower bottom) × height ÷2, and the calculation formula is S=(a+b)×h÷2.
8. cuboid volume = length × width × height, and the calculation formula is V=abh.
9. The area of a circle = π× radius square, and the calculation formula is V=πr2.
10, cube volume = side length × side length × side length, and the calculation formula is V=a3.
1 1, cuboids and cubes can all be written as bottom area × height, and the calculation formula is V=sh.
12, the volume of cylinder = bottom area × height, and the calculation formula is V=sh.
Primary school mathematics orally defines the classification 1, and what is the circumference of the figure?
The sum of all the edges of a figure is the perimeter of the figure.
2. What is the area?
The size of the surface or closed plane figure of an object is called their area.
3, the relationship between the parts of addition:
One addend = and-the other addend.
4, the relationship between the parts of subtraction:
Minus = Minus-Difference Minus = Minus+Difference
5, the relationship between the parts of multiplication:
One factor = product ÷ another factor