Answer:
What do you mean, I'll help.
Step-by-step explanation:
The third choice.
The sides of the photo plus the margins of the border equal x.
The answer is A. 88.8 cm2
Work:
74 x 2 = 148
14.8 = 29.6
Add them = 177.6
then 
Answer:
12
Step-by-step explanation:
sum of all angles of triangle =180
3x-12+2x+11x=180
16x-12=180
16x=192
x=12