Do i have 4 right? ? and how would i do 5 just take 20 and = it to 4x and then divide? ? so it would look like 20=4x den 5=x is this right or am i wrong tell me i need to asap plzz (so don't mind the hand writing)

4 is correct with the perfect reasoning.

5 says SRT is the same as STR
So SRT = 20
STR = 20
Now if STR is 20, then STU has to be 160 because the two angle have to add up to 180 to make a straight line
So 160 has to equal 4X
4x=160
X=40

4 divided by 20 equals 5 so it should be right I haven't done this in a while

Letter c hope it