How to draw the rotation of the figure

How to draw the rotation of the figure

The key of graphics rotation is the rotation center, rotation direction and rotation angle
When drawing, connect all the points on the graph with the center of rotation, draw a circle with the center of rotation as the center of the circle and the length of the connecting line as the radius, find out the corresponding points according to the angle of rotation, and then draw all the corresponding line segments

In life, you see the phenomenon of amplification

Magnifying glass, microscope, concave mirror, telescope, movie, projector, photo developing

What other things in life can enlarge the object's figure

Projector
computer software
Movie theater player
Utilization of convex lens
magnifier

The practical use of sector chart in daily life

Sector chart can accurately reflect the percentage of each group of data

Find out several beautiful patterns formed by translation in life

External walls of buildings

Where do you use multiple bar charts in your life

As long as the sample has classification, it can be used. For example, we can see the support rate of boys and girls for different questions

Where do you use more than ten thousand in your life? Please write down four of them______ 、______ 、______ 、______ ．

Many places in our life use more than ten thousand numbers, such as the speed of light, national population, land area, the total number of animals, etc. so the answer is: the speed of light, national population, land area, the total number of animals

Where do you use negative numbers in your life

Revenue and expenditure
Rise and fall of water level
Getting on and off
Vector, the distance in the direction

Where do we need to spend tens of thousands or more in our life
Write specific numbers

5 million units of penicillin. China has a population of 1.3 billion

Use the shadow to tell the direction
Around noon, draw the running track of the shadow on the top of the vertical bar on the ground by using the method of point tracing, find out the point a nearest to o, and OA will indicate___ South______ (choose "North-South" or "East-West") direction_________ Light propagates along a straight line in a homogeneous medium___________________ .
There are similar problems
I can't understand his answer
Why must it be the shortest?
Why South

The shadow is shortest at noon
At noon on any day of the year, except in the tropics, the sun is due south (the southern hemisphere is due north)
Then the direction of the shadow at noon is due north and south
Then OA indicates the South (southern hemisphere)