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Can somebody help me out?

Can somebody help me out?-example-1

1 Answer

4 votes
Because it is an equilateral triangle each angle A,B and C is 180°/3 or 60°

(3x-3)° = 60°
3x - 3 = 60
3x = 60 + 3
3x = 63
x = 63/3
x = 21°

(8y - 4)° = 60°
8y - 4 = 60
8y = 60 + 4
8y = 64
y = 64/8
y = 8° (ANSWER)
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