1, square c perimeter s area a side length perimeter = side length? 4C=4a Area = side length? Side length S=a? a

2. cube v: volume a: side length surface area = side length? Side length? 6S table =a? Answer? 6 volume = side length? Side length? Side length V=a? Answer? a

3. rectangle c perimeter s area a side length perimeter = (length+width)? 2C=2(a+b) Area = length? Width S=ab

4. cuboid v: volume s: area a: length b: width h: height (1) surface area (length? Width+length? Height+width? High)? 2S=2(ab+ah+bh)(2) Volume = length? Wide? High V=abh

5. triangle s area a bottom h height area = bottom? Tall? 2s = huh? 2 triangle height = area? 2? Base triangle base = area? 2? high

6. parallelogram s area a bottom h height area = bottom? High s=ah

7. trapezoidal s area a upper bottom b lower bottom h height area = (upper bottom+lower bottom)? Tall? 2s=(a+b)？ h？ 2

8. circular s area c circumference? D= diameter r= radius (1) circumference = diameter =2? Radius C=? d=2？ R(2) area = radius? radius

9. cylinder v: volume h: height s; Bottom area r: bottom radius c: bottom perimeter (1) lateral area = bottom perimeter? High (2) surface area = lateral area+bottom area? 2(3) Volume = bottom area? Height (4) Volume = lateral area? 2? radius

10, cone v: volume h: height s; Bottom area r: bottom radius volume = bottom area? Tall? three

Total? Total number of copies = average

Xiaoshengchu Mathematics: Formula Summary of Concentration Problem

Formula of concentration problem:

Solute weight+solvent weight = solution weight.

The weight of solute? The weight of the solution? 100%= concentration

The weight of the solution? Concentration = weight of solute

The weight of solute? Concentration = solution weight