<p>This is probably a very simple question but i cant get it. </p>

<p>Test 4- Section 9, Question 8.</p>

<p>In the Semicircle above, the center is at (4,0) Which of the following are x-coordinates of two points on this semicircle whose y coordinates are the equal?</p>

<p>Answer - (b) 1 and 8.</p>

<p>The answer is C, not B. I'm looking at the key right now.</p>

<p>Just look at the pair of numbers that are equal distances apart from the center- 2 and 6 are 2 coordinates away from the 4. </p>

<p>You can just look at it really if you mark off 1, 2, 3, 5 ,6 ,7 on the X axis. All of the answer choices besides C have points that have 2 different y values.</p>