<p>Guys I need help with doind problems one and two.
For one I dont know how to set it up. On two I keep on getting 70.</p>
<p>1.) E
2.) E</p>
<p>Amazon.com:</a> Dr. John Chung's SAT Math (9781439234976): John Chung: Books TIP 50</p>
<p>I got number 2 not numner one please help. BUmp</p>
<p>They are isosceles triangles, i.e. 45,45,90. The two angles that touch the line in the middle are 45 degrees each, a straight line is 180 degrees, and the two angles (45 + 45 = 90) and subtract their sum from the 180 degrees of the straight line (180 - 90 = 90), and you get answer E, 90 degrees. Does that help?</p>
<p>-iBP</p>
<p>How can you justify that they are 45-45-90 triangle? Why cant it be some other triangle?</p>
<p>It’s hard to explain over the internet, but you two parallel lines cut by a transversal. Angles M and E are simliar as well as angles M and A, angles D and B are indifferent. Now think of the top triangle as the bottom reflected across a line of symmetry (or x axis if you will), you should see that angel’s A and E are similar and the two angle M’s are also similar which means that A=E=M. Also B=D but they don’t equal A, E, and M.</p>
<p>I know it’s confusing. If you still don’t get it, I’m here. :)</p>
<p>iBP</p>