This is a student s attempt to solve for c I need to explain

Last updated: 6/29/2023

This is a student s attempt to solve for c I need to explain what the student did right and what they did wrong I have determined that they attempted to use the Bisector Theorem but I am having a hard time explaining it Can you please give me some tips Thank you Student Solution 2 3 10 cos 60 2 1 2 7 2 20 5 C E 2