<p>I have no idea how to do number 20 on the math section for the 2008 PSAT (form W)</p>
<p>sorry but there is no way I could put the question here. Anyone who has that test please help me</p>
<p>The correct answer is A - 18. It is all in how you look at the figure. First draw a diagonal from R to T. Then draw a diagonal from U to S. These two diagonals will divide the square into four equal parts. If you look closely you can see that the shaded part is equal to the unshaded part. So half of 36 is 18. Hope this helps!</p>
<p>Wow thank you so much, I never would have even approached it like that</p>