12. ∆BRY ~ ∆ANT. Which ratio of sides gives the scale factor?
A.
[tex] \frac{an}{at} [/tex]
B.
[tex] \frac{ an}{br} [/tex]
C.
[tex] \frac{at}{br} [/tex]
D.
[tex] \frac{nt}{br} [/tex]
