Answer:
To find the perimeter of a triangle, add all the side lengths
Step-by-step explanation:
a kilometer is 1000 meters. a meter is 1 meter so the answer is:
1/1000

does this make sense to you? Do you have any questions about raising numbers to a negative value?
The term "supplementary" means that the two angles add up to 180°, which means we can write an equation:
17x + x = 180
18x = 180
÷ 18
x = 10
And now you can multiply 10 by 17, because it is 17 times the angle, to get 170° and 10° as your answer.
I hope this helps!