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iiAriana
 one year ago
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.



Write and solve an equation to determine the measure of angle x.
iiAriana
 one year ago
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.    Write and solve an equation to determine the measure of angle x.

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mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0Here is the figure. dw:1436386396920:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0The lines in bold black are lines and form angles x and y. dw:1436386494600:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0What 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? dw:1436386563967:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0Are you familiar with a straight angle?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0Ok. Here is a refresher for your memory.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0Opposite rays are rays that lie on the same line, have the same endpoint, but they go in different directions. Here is line m. dw:1436386851147:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0Here are points A, O, and B, on line m. dw:1436386879204:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0Now look at rays OA and OB. They are opposite rays because they lie on the same line, have the same endpoint, and go in different directions.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0The angle formed by rays OA and OB is angle AOB. Angle AOB is a straight angle and its measure is 180 degrees.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0A straight angle is an angle formed by opposite rays. The measure of a straight angle is 180 degrees.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0dw:1436387052745:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0Do you remember straight angles better now?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0The angles measuring x, 80 and 60 form a straight angle, so their measures add up to 180 deg. dw:1436387213264:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0Now you can write an equation that can be solved for x.
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