Question

In a triangle, the measure of the second angle is twice the measure of the first angle. The third angle is equal to the sum of the other angles.



Which of the following could represent the measures of the three angles?

x, 2x, 2x
x, 2x, 3x
x, 2x, 4x

Answer 1

So first,

x = first
2x = second
3x = third

x+2x+3x=180 degrees
6x=180 degrees
x=30 degrees

Measures of this would be 30 degrees, 60 degrees, and 90 degrees.
Based on this information the answer would be: x, 2x, 3x