Guy pl im desperate hereee also dont mind the mark i made that was on accident

1)   rotation

2)   translation

3)   reflection

4)   rotation

first: rotation

the first one is a rotation because it has been moved around a little bit/rotation

second: translation

the second one you were correct on because it has just been moved/translated

third: reflection

the third one is a reflection because it is like the triangle is looking in a mirror and is a reflection

fourth: rotation

the fourth one is a tricky one because it is trying to make you thing that it is a reflection on the other side but it is actually a rotation because if it was a reflection it would be right below it, and it was just rotated around half way, so it is a rotation.

the diameter is 16 cm. are you a teacher?

step-by-step explanation: