What is the sum of the interior angles of a nonagon (9 sides)?
Interior and Exterior Angles of Polygons

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Mathematics
•
8th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
1260°
2.
FLASHCARD QUESTION
Front
What is the formula to find the sum of the interior angles of any polygon?
Back
(n-2)180
3.
FLASHCARD QUESTION
Front
What is the formula to find one interior angle of a regular polygon?
Back
((n-2)180)/n
4.
FLASHCARD QUESTION
Front
What is the measure of each interior angle in a regular octagon (8 sides)?
Back
(8-2)180/8 = 135°
5.
FLASHCARD QUESTION
Front
What is the measure of each exterior angle in a regular polygon with 10 sides?
Back
360°/10 = 36°
6.
FLASHCARD QUESTION
Front
How many sides does a polygon have if each exterior angle measures 30°?
Back
12 sides (360°/30° = 12)
7.
FLASHCARD QUESTION
Front
What is the relationship between the interior and exterior angles of a polygon?
Back
Interior angle + Exterior angle = 180°
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