Math # 2

Archive SAT Subject Test Preparation
1

<p>Hey All, quick question. In the Prep Packet for Math <a href=“College Board - SAT, AP, College Search and Admission Tools”>College Board - SAT, AP, College Search and Admission Tools;
how is number 2 worked out. I keep playing with is and I can’t see why it’s x + z? thanx</p>

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<p>call the intersection in the center O. angle CDO is y. this makes COD 180-y-z. COD and x are supplementary,
COD + x = 180
180-y-z+x = 180
x = y+z</p>

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<p>I appreciate it !</p>