As shown in the figure, it is a plane figure inlaid by 12 equilateral triangles with equal sides, so the parallelograms in the figure are common______ One

As shown in the figure, it is a plane figure inlaid by 12 equilateral triangles with equal sides, so the parallelograms in the figure are common______ One

According to the above analysis, there are 21 parallelograms in the figure

Primary school plane graph network diagram arrangement
The faster the better, within a day, must be a network diagram, and to be detailed~~~
If good, add another 50~~~
To a master, help~~~~~
First floor, what do you mean?
On the second floor, there should be formulas, features and the relationship between each figure

I see
There are triangle, parallelogram, rectangle, square, trapezoid and circle
Area, right?
Triangle: bottom * height / 2
Parallelogram: bottom * height
Rectangle: length * width
Square: side length * side length
Trapezoid: (upper bottom + lower bottom) * height / 2
Circle: 3.14 (PI) * r * r (radius)

As shown in the figure, the rectangle o ′ a ′ B ′ C ′ is a visual graph of a plane figure placed horizontally, where o ′ a ′ = 6 and O ′ C ′ = 2, then the area of the original figure is______ ．

∵ rectangle o'a'b'c 'is an intuitive graph of a plane graph, where o'a' = 6, o'c '= 2, ∵ the area of the intuitive graph is 6 × 2 = 12 ∵ the area of the intuitive graph: the area of the original graph = 24 ∵ the area of the original graph is 12 ／ 24 = 242

If a horizontal plane figure is an isosceles trapezoid with a base angle of 45 ° and a waist and upper bottom edge of 1, then the area of the plane figure is______ ．

As shown in the figure: draw the original plane figure according to the rule of oblique two surveying method from the known oblique two surveying direct view figure, the area of this plane figure = 2 × (1 + 2 + 1) 2 = 2 + 2, so the answer is 2 + 2