Draw a triangle AOB and rotate 90 ° counterclockwise around o point

Draw a triangle AOB and rotate 90 ° counterclockwise around o point

The figure of rotation is as follows

Draw a triangle AOB & nbsp; rotated 90 degrees clockwise around o point

The drawing is as follows:

Draw a triangle ABC randomly and make the following rotation: Center on the midpoint of AC and rotate the triangle 180 degrees
Draw any triangle ABC to make the following rotation
0 - question time 2008-7-20 18:29 why are questions closed
1. Take a as the center, rotate the triangle 40 degrees counterclockwise; 2. Take B as the center, rotate the triangle 60 degrees clockwise; 3. Take any point outside the triangle as the center, rotate the triangle 120 degrees clockwise; 4. Take the midpoint of AC as the center, rotate the triangle 180 degrees (draw a picture)

The sum of two sides is not greater than the third side
7-4