ASA postulate because theres two angles and the side in the middle

Length of the base = 16 km.
Length of the hypotenuse = 34 km. 
✎ The length of the missing leg ''
".

The length of the missing leg "a" is
.

Using Pythagoras theorem, we have




Hence verified. ✔

Answer:
4:9
Step-by-step explanation:
Not travelling: travelling
12 : 27
4 : 9
12 and 27 have 3 as a common factor
Therefore the ratio can be simplified to:
12/3 : 27/3
4 : 9