In the figure below, angle y and angle x form vertical angles. Angle y forms a straight line with the 80° angle and the 60° angle.
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Write and solve an equation to determine the measure of angle x.

Question

In the figure below, angle y and angle x form vertical angles. Angle y forms a straight line with the 80° angle and the 60° angle. 
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Write and solve an equation to determine the measure of angle x.

iiariana · Answer

attachment

mathstudent55 · Answer

Here is the figure.
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mathstudent55 · Answer

The lines in bold black are lines and form angles x and y.
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iiariana · Answer

Okay

mathstudent55 · Answer

What is the sum of the measures of angles 1, 2, 3, and 4.
When a bunch of angles add up to a straight angle, what do their measures add up to?
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mathstudent55 · Answer

Are you familiar with a straight angle?

iiariana · Answer

Some what

mathstudent55 · Answer

Ok. Here is a refresher for your memory.

mathstudent55 · Answer

Opposite rays are rays that lie on the same line, have the same endpoint, but they go in different directions. 
Here is line m.
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mathstudent55 · Answer

Here are points A, O, and B, on line m.
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