I need help please..

Hi i think its 4 :)

Step-by-step explanation:

3 is 39, 4 and 2 are 141.

Step-by-step explanation: since 3 is directly opposite to angle 1, they are equal. same goes for 3 and 4. Also, 3 and 2 create a straight line meaning they ALWAYS will add up to 180. subtract 39 from 180 and you get 141. Hope this helps :)

597

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional