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
, cuboid
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×∈
nine
cylinder
Five: volume
tall
s; Jianping
R: bottom radius
C: perimeter of bottom surface
(1) Transverse area = bottom circumference × height.
(2) Surface area = lateral area+bottom area ×2
(3) Volume = bottom area × height
(4) Volume = lateral area ÷2× radius.
10
cone
Five: volume
tall
s; Jianping
R: bottom radius
Volume = bottom area × height ÷3