Question

I really need help with this to find x value and need reasons ​

Answer 1

x = 45 degrees

Explanation:

All angles in a triangle will add up to 180 degrees. So far we have 57 degree of 180. We also see a supplementary angle, with one side being 102 degrees, so the other is 78 degrees, because it must add up to 180. We see that the arrows in the bases show that the corners are even, so now we know two corners: one with 57 degrees and the other with 78.

Now, follow this equation to find x:

57 + 78 + x = 180

135 + x = 180

-135 -135

x = 45