How would u find the answer idk if they would still be the same and you just have to find that one missing angle?

Well... with the information you are given you just have to assume they are congruent triangles. The first picture looks like a right triangle, but the angle is 100 not 90... so it wouldn't actually look like that.

So for the missing angle all you do is 180= 100+ 55 + x

x=25

Then just match up the angles with the other triangle, they would be the same. K with F, J with G, and so on

Answer: 900°

good luck on your studies! : )

david edward.