Answer:
10) 
11) 
Step-by-step explanation:
Well first let's make the box.
10)
Look at the image below ↓

11)
Look at the image below ↓

<em>Thus,</em>
<em>number 10 is </em>
<em>and number 11 is </em>
<em>.</em>
<em />
<em>Hope this helps :)</em>
The answer is A. Always.
The diameter of a circle is a line that goes from one side to the other hence passing through the center!
Hope this helped!