Question

Using only elementary geometry, determine angle x. Provide a step-by-step proof. View attachment.

Answer 1

That's not too hard. If you know angle CED and AEB then you can subtract those both from 180 to find angle x. does that make sense so far?

Answer 2

You can find AEB because you know the other two angles in the triangle AEB -- EAB is 70, and ABE is 80. that gives us angle AEB.

Answer 3

Similarly we can solve for angle ACB because we know CAB is 80 and ABC is 80.

Answer 4

Was it you who asked this question a couple of days ago? I gave most of the answer then to you or someone else.

Answer 5

http://openstudy.com/users/jamesj#/updates/4edd7edee4b01b4ec492f7f9