1

square

C circumference

S region

length of a side

Perimeter = side length ×4

C=4a

Area = side length × side length

S=a×a

2

cube

Five: volume

A: Edge length

Surface area = side length × side length ×6

S table =a×a×6

Volume = side length × side length × side length

V=a×a×a

three

rectangle

C circumference

S region

length of a side

Circumference = (length+width) ×2

C=2(a+b)

Area = length × width

S=ab

four

Cubic

Five: volume

Student: Area

A: Dragon.

B:

extensive

tall

(1) Surface area (L× W+L× H+W× H) ×2

S=2(ab+ah+bh)

(2) Volume = length × width × height

V=abh

five

triangle

S region

Adidas

H height

Area = bottom × height ÷2

s=ah÷2

Height of triangle = area

× 2 base

Triangle base = area

× 2 Current height

six

parallelogram

S region

Adidas

H height

Area = bottom × height

S = ah

seven

trapeziform

S region

A shangdi

Shadi

H height

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

s =(a+b)× 1

h \u 2

eight

Round; circular

S region

C circumference

∏

D= diameter

R= radius

(1) circumference = diameter ×∏=2×∏× radius

C=∏d=2∏r

(2) area = radius × radius×∈