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12. Find the sum of the interior angles of a polygon with 19 number of sides
a. 3060°
b. 3070
c. 3080°
d. 3090°

13.What is the number of sides of a polygon with 3240 sum of its interior angles?
a.16
b.17
c.18
d.19

14.Determine the number of sides of regular polygon with 20 measure of external angle.
a.17
b.18
c.19
d.20

Sagot :

[tex]\huge\red{A}\red{N}\red{S}\red{W}\red{E}\red{R}[/tex]

[tex]\huge\red{12.B}[/tex]

[tex]\huge\red{13.D}[/tex]

[tex]\huge\red{14.A}[/tex]

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