Answer:
Triangle three(bottom left corner)
Step-by-step explanation:
We know one angle must be 61, as it is given. The other angle can be found by subtracting 126 from 180.
So 180-126 = 54
So the two angles we are looking for are 61 and 54.
However none of the triangles have that those numbers, so we must find the third side. Using that the sum of the angles must be 180,
180-61-54 = 65
So the third angles must be 65
So now we look for the triangle that has 2 of the following: 65, 54, 61
Triangle 3 fits this.
