Let n = the number of points
(x-1) + ... (x-x)
The last term will always be 0, when you reach that, stop.
ex. 1pt: 1-1=0
2pt: (2-1) + (2-2) = 1
3pt: (3-1) + (3-2) + (3-3) = 3
Look up the law of sines, I suggest Khan Academy. It is better if you know how to do it, it is very useful.
Answer:
I Don't know either
Step-by-step explanation:
I know
Perimeter of rectangle:2(length+width):2(13+7)=40
Perimeter of square:4(length of one side):4(x)=40
X=10
Im not sure i understand the question, but i think 25/7