The triangle at top has a perimeter of 5, 12, and 13. The square has a perimeter of 29, 12, 29, and 12. If you add all those up you get 112
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Step-by-step explanation:
<span>supplement = 2(complement )+43
..
180-x=2(90-x)+43
180-x=180-2x+43
2x-x=43
x=43 deg</span>
I think the answer would just be 12a because -9a? And +9a? Would cancel out and the -10 and +10 would cancel out so all that is left is the 12a
