this is the link of a video that can help , I promise I'm not trolling , this an actual video , just copy paste it somewhere and it may be of help to you, it's to find the diameter from circumference.
Step-by-step explanation:
once the diameter has been found , half it , and you have your radius , then for area use the formula , A = pi r² , and you have you now found Radius , Diameter and Area.
