bearing in mind that parallel lines have the same exact slope, then any parallel line to the one above will have the same slope as that one.

The graph falls to the left and falls to the right.
imagine the diagonal of a rectangle being the split between two triangles. you are trying to find the longest side of the triangle, which is the "diagonal" of the rectangle.
to find the length of a side of a triangle, use the Pythagorean theorem. it is : a^2 + b^2 = c^2
so... plug in your data like this...
15^2 + 12^2= c^2.
225 + 144 = the square root of 369.
that is rounded to 19.2
this is just how I would solve this problem, if I helped you out please just let me know by voting me brainliest! Haha just kidding :)
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Answer:
309
Step-by-step explanation:
2781/9