1. Let’s denote the degree measure of angle 1 through x.
2. Determine the degree measure of angle 2:
3 * x = 3x.
3. The sum of adjacent angles is equal to 180˚, compose and solve the equation:
3x + x = 180˚;
4x = 180˚;
x = 180˚: 4;
x = 45˚.
4. The degree measure of angle 1 is 45˚.
Answer: The degree measure of angle 1 is 45˚.
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