A closed plane figure with at least 3 sides.

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Presentation transcript:

A closed plane figure with at least 3 sides. Each side intersects two other sides, one at each endpoint, so that no two sides w/ a common endpoint are collinear. The line segments that form a polygon. The point where two sides of a polygon meet. A polygon that doesn't contain a point in the interior of the polygon. All interior angles are less than 180°.

A polygon with at least on point in the interior. At least one angle greater than 180° A polygon with n number of sides. 20-gon is a polygon with 20 sides. All sides are congruent. All angles are congruent. All sides and angles are congruent.

polygon sides two collinear vertex

not a polygon convex polygon concave polygon

This isn't a polygon because it's not made up of line segments only. This is a convex polygon.

8 regular polygon

congruent 5x - 1 4x + 3 x 4 4 4 19 19

This polygon is a quadrilateral. It's not equilateral, equiangular or regular. m∠1 = m∠2 4x + 8 = 5x - 5 13 = x m∠1 = 4x + 8 m∠1 = 4(13) + 8 m∠1 = 60°

1st Period 7:00 – 7:06 2nd Period 7:12 – 7:18 3rd Period 7:24 – 7:30 4th Period 7:36 – 7:42 5th Period 7:48 – 7:54 6th Period 8:00 – 8:06 7th Period 8:12 – 8:16 8th Period 8:24 – 8:30