Please help I'm not able to solve this I have tried so many times and the answers I have gotten are all wrong. Please help!! If all three of these questions are too much for you its ok I can just ask another person, but please don't use this questions just for points I really need help!!

A 50-centimeter piece of wire is bent into a circle. What is the diameter of the circle? What is the radius of the circle? What is the area of the circle?