Help please.
ABCDE ~ FGHIJ. Figure 2 is a dilation of figure 1, and the scale factor is 0.6. Given that FG = 12 cm, find AB.
A. 2 cm
B. 7.2 cm
C. 20 cm
D. 24 cm

Question

Help please.
ABCDE ~ FGHIJ. Figure 2 is a dilation of figure 1, and the scale factor is 0.6. Given that FG = 12 cm, find AB. 
A. 2 cm 
B. 7.2 cm
C. 20 cm 
D. 24 cm

anonymous · Answer

attachment

anonymous · Answer

@tkhunny  0.6 * 2 would be 7.2 so is B correct?

tkhunny · Answer

FG and AB are corresponding line segments.  As linear measures, they should have exactly the same ratio as the dilation.

Note that AB is larger than FG.  $\dfrac{FG}{AB} = 0.6$

Please try again.

anonymous · Answer

I got 24.

tkhunny · Answer

??  You'll have to show me that.  Check the batteries in your calculator.

$\dfrac{FG}{AB} = \dfrac{12}{AB} = 0.6 \rightarrow \dfrac{12}{0.6} = AB = 20$

Okay, how did you manage 24?