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
