1, rectangular area = length× width, and the calculation formula is S=ab.

2. Square area = side length × side length, calculation formula S=axa=a23, rectangular perimeter = (length+width) ×2, calculation formula C=(a+b)×24, square perimeter = side length ×4, calculation formula C=4a.

3. parallelogram area = base × height, calculation formula S=ah6, triangle area = base × height ÷2, calculation formula S=axh÷2.

4. Trapezoidal area = (upper bottom+lower bottom) × height ÷2, calculation formula S=(a+b)xh÷28, cuboid volume = length × width × height, calculation formula V=abh.

5. Area of circle = π× radius square, calculation formula V=Ttr2 10, cube volume = side length× side length× side length, calculation formula V=a3.

6. The volume of cuboids and cubes can be written as the bottom area × height, and the calculation formula is V=sh 12, the volume of cylinders = bottom area × height, and the calculation formula is V=sh.