SAT Subject Test Mathematics Level 1

Now you can see that    BD  =   BC  +   CD  =   7.5 +   5   =   12.5.

17 . A
Parallel lines have the same slope, so you’re looking for a line with a
slope of –2. Only (A) and (B) have that slope, and of those, only (A) has y-
intercept +4.

18 . E
Add to the figure. Diagonal BD will divide the quadrilateral into two
familiar triangles:

ABD is  a   right   triangle    with    legs    3   and 4,  so  BD  =   5,  and therefore   BCD is  a

5-12-13 right   triangle.

The area    of  the 3-4-5   triangle    is

And the area    of  the 5-12-13 right   triangle    is