Answer:
Value of [tex]x[/tex] is $15$ degrees and measure of a vertical angle is $105$°
Step-by-step explanation:
These are vertically opposite angles which are congruent and hence equal.
Thus,
[tex]x+90=7x\\
\implies 90=6x\\
\implies x=\frac{90}{6}=\frac{30}{2}=15^o[/tex]
Find the measure of a vertical angle by putting the value of $x$ as $15$
