interior angle of a regular 18-gon.
It is easier to calculate the exterior angle of a regular polygon of n-sides (n-gon) by the relation
exterior angle = 360/n
For a 18-gon, n=18, so exterior angle = 360/18=20 °
The value of each interior angle is therefore the supplement, or
Interior angle = 180-20=160 degrees.
Naming of a 9-gon
A polygon with 9 vertices is called a nonagon (in English) or enneagon (French ennéagone, but the English version is sometimes used)
You had a good start with the correct answer.
Exterior angle of a 15-gon
The exterior angle of a 15-gon can be calculated using the relation given in the first paragraph, namely
Exterior angle = 360/15=24 degrees
Two of the forms used for filing individual federal income tax returns<span> are IRS </span>Form 1040A<span> and IRS Form </span>1040EZ. Trhe third one is the complex IRS Form 1040. <span>Form 1040EZ is the briefest version of the 1040. You can't itemize deductions or claim any adjustments to income or tax credits except for the </span>Earned Income Credit<span>, and you can't have any income from self-employment, </span>alimony<span>, dividends or </span>capital gains<span>. </span><span>
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Answer:
x=-4 y =4
Step-by-step explanation:
Look at the line
