Carcass wrote:
Attachment:
#GREpracticequestion In the figure, ABCD is a square.jpg
In the figure, ABCD is a square and BCP is an equilateral triangle. What is the measure of x ?
(A) 7.5
(B) 15
(C) 30
(D) 45
(E) 60
Since PC = DC, we see that triangle PCD is an isosceles triangle. We see that angle PCD = 60 + 90 = 150 degrees. Using triangle PCD, we have:
2y + 150 = 180
2y = 30
y = 15
So angle DPC = 15 degrees, and we can see that angle BPA = 15 degrees. Since angle BPC = 60 degrees, then angle APD, or x, is 60 - 2(15) = 30 degrees.
Answer: C