1995 AHSME Problem 10

The area of the triangle bounded by the lines y = x, y = - x and y = 6 is

\mathrm{(A) \ 12 } \qquad \mathrm{(B) \ 12\sqrt{2} } \qquad \mathrm{(C) \ 24 } \qquad \mathrm{(D) \ 24\sqrt{2} } \qquad \mathrm{(E) \ 36 }

Full credit goes to MAA for authoring these problems. These problems were taken on the AOPS website.