2 answers:
Answer:
x = 2
Step-by-step explanation:
All the red lines tell you that each side must be equivalent because the angles are aka equilateral triangle.
So, 2x+4 = 8
2x = 8-4
2x = 4
2x/2 = 4/2
x = 2
This is an equilateral triangle because the angles inside are same so that the sides of the triangle are same too
2x-4=8
2x=12
x=6
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Answer:
the first one
Step-by-step explanation: