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# Math Vocab

### 1.4 pages 29-36

TermDefinition
Polygon (how to name it): Are 2-dimensional shapes. They are made of straight lines, andthe shape is "closed" (all the lines connect up)
Side of a polygon: A line segment connected to form
Vertex of a polygon: The point where 2 lines meet to form an angle and the corners of polygons and polyhedra are vertices
Concave vs convex polygons: Concave polygon is defined as a polygon with one or more interior angles greater than 180°. Convex polygon is defined as a polygon with all its interior angles less than 180°
Regular polygon: Is a polygon that is equiangular (all angles are equal in measure) and equilateral (all sides have the same length). Regular polygons may be either convex or star
N-gon and other known polygons names: Polygon with n sides
Perimeter and Area of a triangle: The distance around a two-dimensional shape. The size of a surface
Perimeter and Area of a square: The distance around a two-dimensional shape. The size of a surface
Perimeter and Area of a rectangle: The distance around a two-dimensional shape. The size of a surface
Created by: Oliviab1.3