Answer: The correct option is 1.
Explanation:
From the given figure it is noticed that there are two right angle triangles.
In triangle RST and triangle VUT the angle S and U are same.
[tex]\frac{RS}{VU} =\frac{12}{6} =2[/tex]
[tex]\frac{ST}{UT}= \frac{16}{8}=2[/tex]
The ratio of the sides are same and an angle is congruent, therefore by SAS the triangle SAS both triangles are similar.
The option 2 and 4 contains the ratio of three sides but only two sides of each triangle are known so option 2 and 4 is incorrect.
[tex]\frac{RS}{VU} =\frac{12}{6} =2[/tex]
[tex]\frac{TU}{TS}= \frac{8}{16}=\frac{1}{2}[/tex]
[tex]\frac{RS}{VU}\neq \frac{TU}{TS}[/tex]
So, the option 3 is incorrect.