1, square (c: perimeter, s: area, a: side length)

Perimeter = side length ×4

C=4a area = side length × side length

S=a×a

2. Cube (V: volume, A: side length)

Surface area = side length × side length ×6

S table =a×a×6 volume = side length× side length× side length.

V= a×a×a

3. rectangle (c: perimeter, s: area, a: side length, b: width)

Circumference = (length+width) ×2

C=2(a+b) area = length × width?

S=a×b

4. Cuboid (V: volume, S: area, A: length, B: width, H: height)

Surface area = (length× width+length× height+width× height) ×2

S=2(ab+ah+bh)

Volume = length× width× height

V=abh

5. Triangle (S: area, A: bottom, H: height)

Area = bottom × height ÷2?

S=ah÷2

Height of triangle = area × 20 base.

Base of triangle = area ×2÷ height

6. parallelogram (s: area, a: bottom, h: height)

Area = bottom × height

S = ah

7. Trapezoid (S: area, A: upper bottom, B: lower bottom, H: height)

Area = (upper bottom+lower bottom) × height ÷2

S=(a+b)×h÷2

8. Circle (S: area, C: perimeter, π: pi, D: diameter, R: radius)

Circumference = π× diameter π=2×π× radius

C=πd=2πr

Area = π× radius× radius

S= π r2

9. Cylinder (V: volume, S: bottom area, C: bottom circumference, H: height, R: bottom radius)

Transverse area = bottom circumference × height =Ch=πdh=2πrh.

Surface area = side area+bottom area ×2

Volume = bottom area × height

10, cone (v: volume, s: bottom area, h: height, r: bottom radius)

Volume = bottom area × height ÷3