Vertical Angles Exploration
Use the protractor to measure angle 1 here and angle 2 below.
What did you get for the measure of [math]\angle1[/math]? How about [math]\angle2[/math]?
Now check that angle 2 is equal in measure to angle 1
[math]\angle1[/math] and [math]\angle2[/math] are said to be [i]vertical [/i]angles. From your observations, what seems to be true?
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Information: Vertical Angles Exploration