Answer:
12 + 10 + 15,62= 37,62
Step-by-step explanation:
According to the Pythagorean Theorem, you will have this:

* There was an error in the correct answer, so I corrected it, as you can see.
I am joyous to assist you anytime.
This is what I got
Area= 31.83 rounded would be 32
Radius= 3.18 rounded would be 3
Diameter= 6.37 rounded would be 6
3.305
+1.7
5.005
Line up the decimal points and add like you usually would add.
5.005 is the answer.