Step 1 is, "draw arcs through both legs of the angle, centered at the vertex of the angle."
_____
The arcs crossing the two legs have the same radius. One arc crossing both legs can be used, if you like.
I think the answer would be (C) 12 because when you lay the line measuring 5 - 4 flat you can see that it is not covering line x completely. When 3 to the new line of 9 you can see that it fits. Hope this helps!
Option C
When
is subtracted from
then the result is 
<h3><u>Solution:</u></h3>
Given that
is subtracted from 
We have to find the result
Subtraction is a mathematical operation that tells us the difference between two numbers.
When "a" is subtracted from "b", we write in mathematical expression as "b - a"
So
is subtracted from
is written mathematically as:

<em><u>Expanding the above expression using algebraic identity:</u></em>


Multiplying the nnegative sign with terms inside bracket
<em><u>There are two simple rules to remember: </u></em>
- When you multiply a negative number by a positive number then the product is always negative.
- When you multiply two negative numbers or two positive numbers then the product is always positive.

Hence the result is: 
Translated down is changing y coordinate
(-2,4)
4-6 = -2
Coordinates of A’ is (-2,-2)
(-4,-7)
reflect over the y-axis
(x,y) -> (-x,y)
(-4,-7) -> (4,-7)
Coordinates of B’ is (4,-7)
Hope this helps!