Look at the angles formed by parallel lines in the figure below:
What is the value of X?
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Look at the angles formed by parallel lines in the figure below:
What is the value of X?
Given that the three lines are parallel:
The 75 degree angle is an alternate angle with the one adjacent to angle X on the right side, and therefore is also equal to 75 degrees.
The 64 degree angle is an alternate angle with the one adjacent to angle X on the left side, and therefore is also equal to 64 degrees.
Now we can calculate:
41°
If one of two corresponding angles is a right angle, then the other angle will also be a right angle.
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