19. given that the lines are parallel, what angle is congruent to angle 6?
20. given that the lines are parallel, what angles are congruent to angle 1?
21. the types of geometry that mathematicians study are:
a. euclidean
b. non-euclidean
c. both euclidean and non-euclidean
d. there are many types

22.using the figures below, what is the next shape in the pattern?

step-by-step explanation:

here's what happens:

1) the graph of f   = x^2 is shifted 2 units to the right.

2) the resulting graph is reflected in the x-axis, so that the parabola now opens down.

3) this final result is transformed up by 5 units.

pay attention in your classes and concentrate the best thing you can do to raise your test scores is to pay attention when you're supposed to be learning the material: in class!

take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.