Question

Given figure CDEFGH ~ figure STUVWX, what is the value of a?



A.
1.07 cm

B.
3.75 cm

C.
6 cm

D.
15 cm

http://static.k12.com/calms_media/media/1572000_1572500/1572066/1/5cce941c6cf9ab8ae0684c79fcb37191712a7b33/MS_IMC-141210-110205.jpg

Answer 1

You could simply find this by the ratio formula of similarity :
\[\frac{ 5 }{ 2 } = \frac{ 15 }{ a }\]

To ge "a" you simply criss-cross and U'll get sth like this :
\[a = 15 * \frac{ 2 }{ 5 } = 3*2 = 6 cm\]

Let me know if you got it :)

Answer 2

ok thx