Art Vocabulary

• Basic geometry concepts and definitions:
• Geometry:  
• Is the area of knowledge, which studies the elements and operations in the place wich points, shapes and lines.
• Point:
• In the geometry a point can be defined as the place or location where two lines insertect.
• Line:
• Is a object in one-dimension with infinite points.
• Ray:
• Is a line, which begins a particular point.
• End point:
• Is the point of one ray what begin.
• Mid point:
• Is the point what It´s in the centre between of the endpoint and a ray.
• Line segment:  
• It´s a line wich two endpoints.
• Straight line:
• Is a line whose points follow de same direction.
• Plane:
• It´s in two-dimensioin, in the space of the plane what can you definited two pararel lines.
• Lenght:
• Measurent of somenthing from the end to the end.
• Mediatrix:
• Is the line what crossing the middle of the segment.
• Bisectriz:
• Is the line what cossing the middle of an angle 90 degrees
• Geometry drawing and supplies concepts and definitions:
• Freehand:
• Is a type of draw, what you don´t use instrumental of measure.
• Technical drawing:
• Is a type of draw, It´s doing with material, usually It ´s doing with material, usually It is using for the architecture plans.
• Compass:
• It´s a object what It´s using for drawing circles and arcs and aslo for measuring distace between points.
• Protactor:
• It´s a instrumental for measuring or drawing angles on paper.
• Set square:
• They are two special triangular. One called 45º triangle and other It called 60º or 30º triangle.
• Eraser:
• Is a object what It is using for deleting something.
• Marker:
• It´s a object, a pen havig a writing point.
• Ruler:
• It´s a object, It used to draw straight lines. 
•  Important definition about circles
• Circle:
• Set of points at the some mdistance to the centre.'
• Circunference:
• It is the full length of a circle , It is the line around a circle.
• Center:
• It is the point equidistant to any of the points ona circle.
• Radius:
• It is the length of a line segment from the centre to its permetere.
• Diameter:
• It is a line segment pass to thr centre and conect two points of the circle.
• Chord:
• Is the line that conect two points but not throught to the centre.
• Arc:
• Segment of a circle (arch for the architecture).
• Arrow:
• Is the perpendicular line from middle of chord.
• Tangent:
• It is a line that cut (touch) in only one point of a circle.
• Definitions of the polygons
• Start Polygon:
• It is a particular polygon  case with a start from or shapes.
• Inscribe Polygon:
• They are polygons place inside circle so all the vertices of the polygon are placed on the circle
• Circumscribed:
• They are polygon sarrounding a circle , begin it sides tangent
• Classisication:
• Convex Polygon:
• Any line draw through the polygon meet its boundary exactly twice, one line segment with endpoints pass two point of the shapes.
• Non-Convex Polygon:
• There exict a line segment between two boundary points that passes outside the polygon
• Equiangular:
• All them corner , angles or vertices are equal.
• Equilateral:
• All edges or sides are of the same length.
• Regular:
• All their vertices , angles and sides are equal.
• Irregular:
• Show different angles and length for their sides.
•  Definitions and classifications about triangles
• Triangle:
• It is a flat figure with 3 sides and 3 angles
  
• According to the sides:
• Equilateral Triangle:
• Has 3 sides equal (and 3 angles too).
• Isoscelis Triangle:
• Has 2 sides equal (and 2 angles too).
• Scalene Triangle:
• Has 3 sides diferents.
• According to the angles:
• Right Triangle:
• Has 1 angle of 90 º
• Acute Triangle:
• Has 3 angles < 90º
•  Obtuse Triangle:
• Has 1 angle > 90º
• The quadrilateral:
• They are polygons with 4 sides and 4 vertices (angles).
• There are 2 types:
• Parallelograms:
• Square:
• 4 sides parallelograms.
• 4 right angles.
• Rectangle:
• 4 sides parallelograms 2 and 2.
• 4 right angles.
• Rhombus:
• 4 sides parallelograms.
• 2 angles parallelograms 2 and 2.
• Rhomboid:
• 2 sides parallelograms 2 and 2.
• 2 angles parallelograms 2 and 2.
• Non parallelograms:
• Trapezium:
• Right: 
• 2 sides parallelograms.
• 2 angles of 90º.
• Isosceles:
• 2 sides don´t parallelograms.
• 2 sides parallelograms.
• Scalene:
• Sides don´t parallelograms.
• Trapezoids:
• 4 sides don´t  equal.
• 4 angles don´t equal.
• Sides don´t parallelograms.
• Definition the elements of the polygon :
• Sides or edges:
• a line or border at which a surface terminates.
• Aphothem:
• It is a line segment, that a perpendicular from the centre of aregular polygon to of its sides.
• Vertex:
• A point that terminales a line curve or comprises the intersection of two or more lines or curves.
• Center:
• It ´s the middle point , that have equal distant from the center to the vertices or the middle of the sides.
•  Diagonal:
•  It is a straight line what connecting two angles or vertices of a polygon.