Question

If two angles are both vertical and supplementary, then the angles are

Answer 1

Ur answer would be RIGHT angle!!!

Hope its right! 

Answer 2

we know that

Supplementary angles are those angles whose sum is equal to $180$ degrees and vertical angles are angles that are congruent.

so

Let

x--------> the first angle

y--------> the second angle

so

$x=y$ --------> equation $1$

$x+y=180$ --------> equation $2$

Substitute equation $1$ in equation $2$

$x+[x]=180$

$2x=180$

$x=90$

$y=90$

therefore

the answer is

the angles are right angles