chase1869
10.04.2020 •
Mathematics
A polygon is regular if each of its sides has the same length. Find the perimeter of the regular polygon.
The perimeter of the polygon is __ units.
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Ответ:
6units
Step-by-step explanation:
Since it is a regular polygon, and it has 3 equal sides it means the polygon is a quadrilateral.
From the diagram,
5 - 2x = -4x + 9 ( side of quadrilateral )
Solving for x in the equation
-2x + 4x = 9 - 5 ( collection of like terms in simple linear equation )
2x = 4
Divide through by the coefficient of x which is 2
x = 2.
Therefore, the perimeter of the polygon which equals to the total length of the polygon is
Perimeter = 2 + 2 + 2
= 6units
Ответ:
With no restrictions 6 comedians can perform in 6! = 720 ways
E _ _ _ _ _
we can fill the 5 blanks with the 5 letters A,B,C,D,F in 5! = 120 ways The probability of that is 120 ways out of 720 or 120/720 or 1/6.
b) comic C will perform fifth and comic B will perform last
_ _ _ _C B
We can fill the 4 blanks with the 4 letters A,D,E,F in 4! = 24 ways. The probability of that is 24 ways out of 720 or 24/720 or 1/30
c) the comedians will perform in the following order D, E,C, A, B, F
D E C A B F
There is just 1 way that can happen. The probability of that is 1 way out of 720 or 1/720.
d) comic A or comic B will perform first
_ _ _ A _ _
There are 5! = 120 ways to fill those 5 blanks with the letters B,C,D,E,F.
In addition to those, there are another 5! = 120 ways to fill these 5 blanks
_ _ _ B _ with the letters A,C,D,E,F.
That's 2(5!) = 2(120) = 240 ways. The probability of one of those is 240 ways out of 720 or 240/720 or 1/3.