1st transformation:

2nd transformation:
When you rotate a point around the origin by 180 degrees, you change both coordinates to opposite values.
Answer:
Greetings !
check the attachment above☝️ but i haven't done the second question wait a moment. thx
You form a rhombus.
Draw an equilateral triangle, and then mirror it around its base. All the sides are clearly equal, because they are all sides of the same equilateral triangle.
Moreover, the top and bottom angle are 60°, because they are angles of an equilateral triangle, while the left and right angles are 120, because they're 60+60 angles.