Answer:

Step-by-step explanation:
Step 1
Find the value of x
we know that
In an inscribed quadrilateral the opposites angles are supplementary
so
In this problem

substitute the values and solve for x




step 2
Find the measure of angle B

substitute the value of x

Answer: 9 inches
Step-by-step explanation:
Answer:
42
Step-by-step explanation:
because that angle is a little less than half of 90 so 42 is the best answer
30^2= 30×30=900 so 30^2 is the answer