What is the sum of interior angles for an octagon?
Unit 3B Flashcard: Polygons and Parallelograms

Flashcard
•
Mathematics
•
10th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
1080 degrees.
2.
FLASHCARD QUESTION
Front
What is the formula to find the sum of interior angles of a polygon?
Back
(n - 2) × 180°, where n is the number of sides.
3.
FLASHCARD QUESTION
Front
What is the measure of each exterior angle of a regular polygon with 5 sides?
Back
72 degrees.
4.
FLASHCARD QUESTION
Front
How do you find the number of sides of a regular polygon given an exterior angle of 20 degrees?
Back
Number of sides = 360° / exterior angle = 360° / 20° = 18 sides.
5.
FLASHCARD QUESTION
Front
What is a parallelogram?
Back
A quadrilateral with opposite sides parallel and equal in length.
6.
FLASHCARD QUESTION
Front
What is one property that confirms a quadrilateral is a parallelogram?
Back
If the diagonals bisect each other.
7.
FLASHCARD QUESTION
Front
Which property is NOT true for a parallelogram?
Back
Diagonals are congruent.
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