Remember your prefixes! They help a lot, because there is a formula for this particular problem. Nonagon refers to a shape with 9 sides.
The number of triangles a polygon has is represented by the formula:
(n-2)
Where "n" is the number of sides. If you ever forget what you subtract "n" by think of a triangle. It has 3 sides, so it is only logical that you should only have 1 triangle (subtract by 2). So, what is the sum of the interior angles of a triangle, 180°. So the formula looks like this:
Sum of Interior Angles = 180°(n-2)
180°(9-2)
180°(7) = 1260° is the sum of interior angles for a nonagon!
A percent mean per 100 so 500% is 500/100
which is 5, and I guess you could use 500/100 and then just divide each by 100 to get the fraction 5/1.
so 5.0 as a decimal
5/1 as a fraction
I ended up with 7/20, but I don't believe it's right. Sorry.
Answer:
33
Step-by-step explanation:
It's decreasing by 7
25 will go into 33 once, with a remainder of eight.
