Point AC is symmetrical about point B. Given AB, it is simple to find C. 2B-A is c, right?

The point AC is symmetrical about the straight line B. It is known that AB can find C, which is not difficult. Just use the formula set.

So if you want something else, you just need to make it a little symmetrical.

For example, the curve AC is symmetrical about point B, and it is known that AB seeks C, then the parameter equation of A can be written first, and then 2b-a is the parameter equation of C, and then converted into an analytical formula. !

For example, the curve AC is symmetrical about the straight line B, and it is known that AB seeks C, then you can still do it by the method of parametric equation.