1. Find all the symmetry axes of the following figures and draw them one by one.

2. Take the straight line as the axis of symmetry, and draw another part of the following figure to make it an axisymmetric figure:

3. As shown in the figure, it is known that the horse-driving camp is at M. Every day, herders will drive the horses to the river to drink water, then graze on the grass, and then return to the camp to try to design the shortest grazing route.

4. As shown in the figure, the formula formed by the image of a formula in the mirror is correct, but is it actually correct? What is this formula actually? (Write it directly)

Fourth, answer questions.

1. The internal angle of an isosceles triangle is less than twice that of the other one. Find the degrees of the three internal angles of this triangle. (Consider two situations)

2. Community greening, the construction of flower beds on a rectangular open space, requires the design pattern to be composed of circles and squares (the number of circles and squares is not limited), and the whole rectangular field is axisymmetric. Do you have a good design? Please draw your design in the rectangle as shown.

3. As shown in the figure, there are three intersecting highways, and now a freight station should be built in the area formed by the intersection of the three highways, so that the distance from the freight station to the three highways is the same. How to determine the location of the freight station? Briefly describe your method.

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