Answer:
60
Explanation:
the dashes in each side of the triangle show you that they are all equal making this an equilateral triangle.
Equilateral triangles have all equal sides and all equal angles. All triangles add up to 180 degrees and since all the angles are the same all you have to do is 180 divided by 3 to find the answer
x=60
A triangle equals 180, and because of the congruence marks, you know all the sides are the same, so by SSS, you know the angles have to be the same as well, so you divide 180 by 3.
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