Question

Hi! :)
Do you mind helping me with any problem from 19-22?
Thank you so much.

http://i85.photobucket.com/albums/k62/sbpll2012/jkj_zps5189d249.jpg

Answer 1

The figure is an hexagon, and we know that it is compossed of equilateral triangles with 60 degrees in each vertex. So,
a) E to H
b) AX to EH
c) NG to EH
d) H to H

Answer 2

So that would be the answer for number 19?

Answer 3

For 17, 18, 19 and 20.

Answer 4

For 21, as you see in the figure, there are 90 degrees.
For 22, is an octogon, 135 degrees.
For 23, 144 degrees.

Answer 5

Thank you :)