The measure of arcSTU is 210 degrees
For the first question, we will use the theorem that states that the angle at the center of a circle is twice the angle at the circumference
Given the following
m<STU = 105 degrees
Substitute to have:
105 = 1/2 arcSTU
arcSTU = 2(105)
arcSTU = 210 degrees
Hence the measure of arcSTU is 210 degrees
Learn more on circle theorems here: https://brainly.com/question/10136582
