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Mathematics Research

Figures flat known: concept:

Square, rectangle, triangle, trapezoid, rhombus, parallelogram, circle, pentagon, hexagon, etc.


1 .- Triangle: is a polygon formed by three sides and three angles. The sum of all angles is always 180 degrees.

2 .- Square: is a polygon with four sides, with the peculiarity that they are all equal. Besides its four corners are 90 degrees each.

3 .- Rectangle: is a polygon with four sides equal in pairs. Its four angles are 90 degrees each.

4 .- Trapezium: is a polygon with four sides, but its four corners are different than 90 º.

4 .- Diamond: is a polygon four equal sides, but its four corners are different from 90 th.

5 .-
Parallelogram: is a parallel four-sided polygon pairs.

6 .- Circle: is the region bounded by a circle, being the locus points which are equidistant from the center.

7 .- Regular hexagon: is a polygon of six equal sides and six angles iguales.Los triangles formed by joining the center with all the vertices, are equilateral.

8 .- regular Pentagon: is a polygon five equal sides and five equal angles.

Quotes and References

http://www.bbo.arrakis.es/geom/

perimeters of plane figures
Square, rectangle, triangle, trapezoid, rhombus, parallelogram, circle, pentagon, hexagon, etc.

The perimeter of all plane figures is the sum of all sides exept the circle:

Area of \u200b\u200bcircle = 2pi *

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Areas of plane figures:

Square, rectangle, triangle, trapezoid, rhombus, parallelogram, circle, pentagon, hexagon, etc.

TABLE OF AREAS AND VOLUMES
	square A = a 2	triángulo · A = B h / 2
	rectángulo A = B · h	romboide A = B · h
	Rombo · A = D d / 2	trapecio A = (B + b) · h / 2
	polygon • the A = P / 2 (1 )	circle A = p · R 2 P = 2 • p · R
	diamond A = D * d/2	Paralelogramo A = b * h

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Pralelogramo:

A = b * h

Pentagono:

A = (P * ap)/2

Quotes and References

http://sipan.inictel.gob.pe/internet/av/geometri/areas.htm

Polyhedra or Solid geometry: concept and elements (faces, edges , vertices).

regular polyhedra: concept

regular tetrahedron:

Its name indicates that it has four triangular faces. The triangles of the faces are all equilateral triangles. It is, therefore, a triangular pyramid.
has six edges and four vertices of order 3.

regular hexahedron or cube:

has six equal sides and therefore is also called regular hexahedron.
has 12 edges and 8 vertices of order 3.

regular octahedron:

has eight faces which are formed by equilateral triangles. Has 12 edges and 6 vertices of order 4.

Icosahedron:

has 20 faces formed by equilateral triangles, 30 edges and 12 vertices of order 5.

Dodecahedron:
has 12 faces formed by regular pentagons, 30 edges and 20 vertices of order 3.

Quotes and References

http://www.terra.es/personal2/fe191257/poliedros.htm

base area, lateral area, total area and volume of regular polyhedra.

Tetrahedron:

to ^{AT = 2 √ 3}

V = √ 2 * a 3 / 12

AL = (sc * ap) / 2

Prisms:

The prisms are polyhedra whose bases are two identical polygons and whose sides are parallelogram. Prisma

oblique: is having its lateral edges oblique to the planes of the bases.

Prisma Rectum if one side edge of a prism are also the altitudes, then it is a right prism.

Prisma Regular: is a solid figure bounded by two regular polygons, lamados bases, and many rectangles as sides have the base.

parallelepipedal