SAT Subject Test Mathematics Level 1

Example 2

Figure  1

One way to find this distance is to apply the Pythagorean theorem twice. First
plug the dimensions of the base into the Pythagorean theorem to find the
diagonal of the base:

Notice that the base diagonal combines with an edge and with the segment
whose length you’re looking for to form a right triangle:

In  the rectangular solid   in  Figure  1,  what    is  the distance    from    vertex  A

to  vertex  B?

1.

(A)

(B)

(C) 9

(D) 11

(E) 15