VOCABULARY

BASIC GEOMETRY CONCEPTS AND DEFINITIONS

•  Geometry:   is the area that studies the elements and operations in the plane .
•  Point:   in  the geometry the point can be the place or the location of two crossed             lines. A point hasn't dimension, height and width .
•  Line:   is a suquence of points .
•  Ray:   is a line that stars at a point .
•  End point:   is the point that indicates the end of a ray .
•  Midpoint:   is the point of a segment that is in the middle .
•  Line segment:   is a line that has begin and end.
•  Straight line:   is a line whose points follow the same direction.
•  Plane:   are two dimensions.
•  Lenght:   the measure of things that go from begin and end .

GEOMETRY DRAWING AND SUPPLIES CONCEPTS AND DEFINITION

• Free hand:daw with the hand without measuring instruments 
• Line/Technical drawing:  is a drawoing which is do whith the help of the material.
•  Compas:   is an instrument to draw circles. 
•  Protractor:   is an instrument for draws angles .
•  Set squares:   two specials triangules one 45 grades and other 60 grades.
•  Erasers:   is an instrument of drawing to delete bad things. 
•  Marker   its a pen with differents tips.
•  Ruler:     is an instrument to draw straights lines.

IMPORTANT DEFITIONS ABOUT CIRCLES

• Circle: set of points at the some distance to center 
• Circunference:It is the full lenght of a circle, it is the line around circle 
• Center: Its the point equidistant to any of the poits on a circle 
• Radious: It is the length of a line segment from the centre to its perimeter
• Diameter:It is a line segment pass to the center and corrects two points of the circle 
• Chord: Is a line that correct two points but not through to the center 
• Arc: Segment of a circle
• Arrow: Is the perpendicular line from middle of choord 
• Tangent: It is  line tha cut (touch) in center

POLYGONS

• Star polygon: Its a particular polygon case with a star form or shape 
• Inscribed polygons: They are polyons placed inside circles so all the vertices of the polygon are placed on the circle 
• Circumscribed: They are polygons sorruoundng a circle, being it sides taugent to the circle inside 

POLYGONS CLASSIFICATION

• Convex polygon: Any line draw through the polygon meets its boundary exacthy twice,one line segment with ndspoints pass to points of the shapes
• Non convex polygon: There exist a line segment between two boundary points that passes outside the polygon 
• Equiangular: All their corner angle or vertices are equal 
• Equilateral: All edges or sides are of the same lenght 
• Regular: All their vertces nles and sides are equal
• Irregular: Show different angles and lengths for their sides 

DEFINITION AND CLASSIFICATIONS ABOUT TRIANGLES

• Triangles: It is a flat figure with 3 sides and 3 angles 
• Equilateral: Has 3 sides equls and angles too
• Isosceles: Has 2 sides equals and two angles equals too
• Scalne: Has 3 sides differents and 3 angles differents too
• Right: Has 1 angle of 90 grades
• A cute: 3 angles less than 90 degrees
• Obtuse: 1 angle less than  degrees