Solve the Problem $n$ Sides Has $\frac { 1 } { 2 } n ( n - 3 )$

question 56

Multiple Choice

Solve the problem.
-If a polygon, of $n$ sides has $\frac { 1 } { 2 } n ( n - 3 )$ diagonals, how many sides will a polygon with 189 diagonals have?

• A) 22 sides
• B) 21 sides
• C) 20 sides
• D) 23 sides

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Definitions:

Test Statistic

A value calculated from sample data during hypothesis testing. It's used to determine the probability of observing the sample results under the null hypothesis.

Completely Randomized Design

An experimental design in which subjects are randomly assigned to treatments, ensuring that each treatment group is statistically equivalent.

Degrees of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution, minus the number of independent constraints.

Required Condition

A prerequisite or necessary condition that must be met for a certain procedure or operation to be carried out correctly.