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

question 134

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:

Transient Ischemic Attack

Often called a mini-stroke, a transient episode of neurological dysfunction caused by the loss of blood flow to the brain, spinal cord, or retina, without acute infarction.

Abbreviation

A summarized form of a word or phrase.

Electroencephalogram

A test that measures electrical activity in the brain using electrodes attached to the scalp, used to detect potential problems associated with this activity.

Abbreviation

A brief form of a word or phrase designed to conserve space or eliminate repetition.