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3 Ways to identify polygons?
What does it mean when a polygon is REGULAR?
All sides and angles are congruent
Segment that joins non-consecutive vertices
The sum of the interior angles of a quadrilateral is always 360 degrees
Quadrilateral Interior Angle Theorem
Describe a plane figure:
Formed by 3 or more segments
No two sides with a common endpoint are collinear
Each side intersects exactly 2 other sides one at each endpoint
Difference between concave and convex?
Concave has a dent
A quadrilateral having both pairs of opposite sides parallel
5 Theorems about parallelograms
Opposite sides are congruent
Opposite angles are congruent
Consecutive angles are supplementary
Diagonals bisect each other
Both pairs of opposite sides are parallel
polygons math geometry yeats soph vocab