Answer:
Let us make the last unknown interior angle be "b"
b+a+36=180
b=180-36-a
b=144-a
for the main triangle,
a+144-a+a-28=180
2a+116=180
2a=180-116
2a=64
a=32
so a=32
Its D. Distribute the -2/3. Subtract the 3 on both sides. the Y-intercept is -1/3 and the slope is a -2/3. So it slopes down and has to have a negative intercept between 0 and -1, D is the only one that does that.
Use tan inverse 5/12, that should be the answer because if the triangles are similar, they have the same angle measures. You can also use sin inverse 5/13 or cos inverse 12/13. I recommend using two of the three, one to get the answer and other to check.
You can't see the question
the answer is 5 since the sides are kinda equal to each other it looks like