It is given that a polygon with n sides has n/2(n-3) diagonals. (a)How many sides does a polygon with 90 diagonals have?
(b)Is there a polygon with 100 diagonals?Justify your answer .

it is b)

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step-by-step explanation:

angle addition postulate

2x=56

step-by-step explanation:

in the attachment.   i didn't see your choices.   the word which means there is choices.

step-by-step explanation:

(x,y)

x tells you how much left or right you go from the origin

y tells you how much down or up you go from the origin

so for example (-3,2), you go left 3 and up twice. i denoted which of the ordered pairs is which in my graph.

investment b is an ordinary annuity with $3,909.64 in the account after one year.

step-by-step explanation: