Angles Part 1

The way you can tell when to set an equation of 90 or 18
is by first looking at the angle. If the angle has a straight

line then its a supplementary angle which in other words
it measure's 180 degrees.
Now for 90 its a different story. If you set an equation for
90 degree's it has to be a square just without the top and
the right part of the square.
If we setg angle's equal to each other means that those angles
are vertical angles.
If we are solving for x and you find what x is and you think you
got the answer. THEN THINK TWICE!!!!!!! Cause your wrong
After you find x you are suppose to plug in the number and substitute
x for that number.
Congruent means the same, And if your wondering yes vertical angle's
are congruent. Complementary and supplementary can be congruent.