Question

can someone help me with geometry problems 9 and 12 in this picture? (please read directions at the top of the picture.

Answer 1

here is the picture of the problem http://www.box.com/s/8bd47136e76f66b70bb7

Answer 2

Let's do 9, 12 is similar.

First find angle(11) in terms of angle(9)

Answer 3

angle 9 is 110

Answer 4

in that case, we can even compute angle(12).

So what's angle(11)?

Answer 5

angle 11 i think is also 110

Answer 6

Does it look like it's 110?