Solve for x for the triangle

Let the mean of the population be 38 instances of from 6" - 9" hatchings per nest, and let the standard deviation of the mean be 3. what sample mean would have a confidence level of 95% or a 2.5% margin of error?

What is the value of x in the diagram below?

Gh bisects fgi. find the measure of hgi •15° •21° •10° •8°