Answer:
The sum of all internal angles of this polygon is: 
Step-by-step explanation:
Recall that the formula for the number of diagonals of a polygon with n-sides is given by the formula:
and since Lucero noticed that the number of digonals was 7 more that the number of sides, then, these two quantities (n + 7) and the number of diagonals must be equal. we can set an equation stating such, and solve for "n" (number of sides of the polygon):
therefore n = 7 or n = -2
The only answer with meaning is the first one (7 sides), since a polygon must have a positive number of sides.
Now that we know the number of sides of the polygon, we can find what the sum of its internal angles should give, based on the equation;
Addition of internal angles of a polygon is = 
Which in our case renders:
Answer: Step-by-step explanation:
y = -7x + 8
X y
-4 36
-2 22
0 8
2 -6
4 -20
So, first, what are the two sides?
let's call then x and y
we know that 2(x+y)=12.5 (that's the distance around)
so that means that x+y=6.25 (I just divided both by 2)
now, x=4y (from "4 times as long as it is wide")
so we can substitute:
x+4x=6.25
5x=6.25
x=1.25
so one side, is 1.25 and the other will be 1.25*4=5
and for the area we multiply the two:
1.25*5=6.25 square kilometers, and this is the answer!
Answer:
1/2
Step-by-step explanation:
thats the answer
Answer:
Pyramid Volume = (Area of Base * Height) / 3
height = side
Pyramid Volume = (side * side * side) / 3
Pyramid Volume = (side ^ 3) / 3
That's the answer. I don't know which of your answers equals that.
Pyramid Volume formula located here: http://www.1728.org/volpyrmd.htm
Step-by-step explanation:
