Explanation:
Let's start by finding each angle on each triangle.
All angles of a triangle add up to 180.
The first triangle has 125 and 40. Adding those together get 165.
180 - 165 is 15, which is that third angle.
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For the second triangle, 125 + 15 = 140.
180-140 = 40
Now we have all angles on both triangles.
Both have 125, 40, and 15. This makes them similar.
JKL = IGH by something we call AA or AAA