Current location - Training Enrollment Network - Mathematics courses - How to calculate the math calculation area of the third grade of primary school students
How to calculate the math calculation area of the third grade of primary school students
There is a formula to calculate what kind of graph:

Calculation formula of mathematical graphics in primary schools

1 square

Area = side length × side length

S=a×a

2 cubic meters

Volume a: edge length

Surface area = side length × side length ×6

S table =a×a×6

3 rectangle

Area a side length

C=2(a+b)

Area = length × width

S=ab

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)

5 triangle

S area a bottom h height

Area = bottom × height ÷2

s=ah÷2

6 parallelogram

S area a bottom h height

Area = bottom × height

S = ah

7 trapezoid

Height of upper bottom b and lower bottom h in s area a

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

s=(a+b)× h÷2

8 laps

Circumference of zone s and zone c

D= diameter r= radius

Area = radius × radius ×∈

Cylinder 9

V: volume h: height s; Bottom area r: bottom radius c: bottom perimeter

(1) lateral area = bottom circumference × height.

(2) Surface area = lateral area+bottom area ×2