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?

The box plots show the distributions of the numbers of words per line in an essay printed in two different fonts.which measure of center would be best to compare the data sets? the median is the best measure because both distributions are left-skewed.the mean is the best measure because both distributions are left-skewed.the median is the best measure because both distributions are symmetric.the mean is the best measure because both distributions are symmetric