Answer:
20
Explanation:
We know that sum of corner of a triangle is 180° and if the triangle is equilateral, the corners are same
180:3=3x
60=3x
x=20
x = 20
since the 3 sides of the triangle are congruent then it is equilateral with 3 congruent angles, each of 60° , then
3x = 60 ( divide both sides by 3 )
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