Write an algebraic expression for the quantities being compared.The first angle of a triangle is triple the third angle. The second angle of a triangle is 20 degrees less than the third angle.
A. first angle = x - 20
second angle = 3x
third angle = x
B. first angle = 3x
second angle = x - 20
third angle = x
C. first angle = 3x + 20
second angle = x - 20
third angle = x
D. first angle = x
second angle = x - 20
third angle = 3x
Answer: B
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