3/10
As you know the answer already I don't think you need any further explanation :)
Answer:
<em></em>
<em></em>
<em></em>
Step-by-step explanation:
Required
Show that:

To make the proof easier, I've added a screenshot of the triangle.
We make use of alternate angles to complete the proof.
In the attached triangle, the two angles beside
are alternate to
and 
i.e.


Using angle on a straight line theorem, we have:

Substitute values for (1) and (2)

Rewrite as:
<em></em>
<em> -- proved</em>
Answer:
G
Step-by-step explanation:
Hope this helps
Answer:
27
Step-by-step explanation:
it just is