If vertical angles are congruent you know
84=4x
21=x
You also know that angle M is supplementary to the angle
, measuring 84. Supplementary means it adds to 180 so if you take the difference you get
180-84=M
96=M
Also M is vertical to the last unknown angle so since vertical angles are congruent the last angle is also 96
A possible answer for #12 could be 12.
as for #13, a possible answer could be 3/4
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i’m sorry if this is incorrect. i truly hope this helps!
