What is a shape in geometry, what is the definition of a shape, and what is the meaning of a shape 1

A graphic ...... enclosed by straight lines joining each other

The definitions of point, line, surface, and volume can only be valid in mathematics, for example, in reality and mathematics, the definition of "straight line" is different, and a straight line in mathematics is infinitely long.

The dot itself is meaningless. In mathematics, a point has no length or width, no shape, no area, and in this sense we can understand it as infinitesimally small. "Point" is just a coordinate used to represent a position, which makes the theory of mathematics more absolute, serious and accurate.

For example, in the step of drawing the number axis, it says: take any point on the line as the origin, and then take the distance between the point and the origin as the unit length. Another example:

There is only one line segment between two points. Due to the appearance of "points", the theoretical definition of mathematics is very serious. In the same way, infinitely thin lines and infinitely thin surfaces are also the cornerstone of mathematics and a model for depicting reality.

The point motion becomes a line, the line moves into a surface, and the surface moves into a body.

What you say "a straight line has length" is wrong, a straight line is infinitely long and has no length.

In a word, points, lines, and surfaces are abstract, we can't understand them, we just need to understand their meaning, they are the cornerstones of mathematics, and abstract things that have no practical meaning can enable mathematics to solve practical problems.

A graphic ...... enclosed by straight lines joining each other

The shapes are: square, triangle.

Pentagon, rhombus, oval, etc.

1. Square.

Special parallelograms.

One. That is, a group of parallelograms with equal adjacent sides and one angle is a right angle called a square, also known as a regular quadrilateral, and the square has all the characteristics of a rectangle and a diamond.

2. Triangle.

A triangle is a closed figure composed of three line segments in the same plane that are not on the same straight line in order to end, which has applications in mathematics and architecture.

3. Pentagon.

Pentagon refers to all polygons surrounded by five sides and five corners in plane geometry, and both perfect and regular pentagons are a special type of pentagons.

4. Diamond-shaped. Within the same plane, there is a group of parallelograms with equal adjacent sides that are rhombuses, and quadrilaterals with equal sides are rhombuses, the diagonal of the rhombus.

Bisect perpendicular to each other and bisect each group of diagonals, the rhombus is an axisymmetric figure, there are two axes of symmetry, that is, the straight line where the two diagonals are located, and the rhombus is a central symmetrical figure.

5. Oval.

An oval is an oblong shape that becomes a circle and is flatter than a circle. The middle of the leaf is wide and the ends are narrow, and the leaf margins on both sides are arc-shaped, which is called an oval leaf. A set of points on the same plane that fix the sum of the distances from two points to another point is called an ellipse.

Points, lines, planes, and volumes, which help people effectively depict the intricacies of the world, are all called geometric shapes.

geometric figure）.The various shapes abstracted from the physical object are collectively referred to as geometric figures. Some parts of a geometric figure that are not in the same plane are called solid figures.

Some parts of a geometric figure are in the same plane and are called planar figures. Although stereoscopic and planar shapes are two different types of geometric figures, they are interrelated. Geometry is generally divided into solid figure and plane figure

A three-dimensional figure that is enclosed by one or more faces and can exist in real life is a three-dimensional figure.

Such as straight lines, rays, angles, triangles, parallelograms.

Rectangles (squares), trapezoids, and circles are also geometric figures, and the parts represented by these figures are all in the same plane, known as planar figures.

Words that denote shapes are: round, square, pointed, oval, lozenge, triangular path, flattened, polygonal, meandering, trapezoidal.

Shape is the composition of an object or its outer boundaries, contours and its surface, and has nothing to do with other properties of the object, such as color, texture, material composition, etc.

Shapes can also be enclosed spaces formed by edges or curves or a combination of the above two things, and psychologists believe that people will mentally decompose images into some simple geometric shapes, called geometric subs. Examples like cones and spheres are geometric subons.

Types of shapes: 1. The princess square is a brilliant style with uncarved and sharp corners. The typical shape is a square rather than a rectangle.

The shape is applied to the crown in a vertical direction, with a wide pavilion at the base and narrowing as it extends to the girdle of the diamond, with a radial facet of the crown. The princess shape is usually 76 sides and is brighter than the bright round.

2. The emerald shape is usually rectangular, but the old square cut can still be seen everywhere. This is a later cutting method, and 48 to 50 refractive surfaces of Hushanmu form the shape of the staircase, and it is generally quadrangular or elongated. The typical size of a 1 carat rectangular emerald cut is 7 by 5 mm.

Basic three-dimensional shapes: cuboids, cubes, cylinders, cones, spheres, prisms, pyramids, bevels, tables, polyhedra, etc.

Three-dimensional geometry.

It can be divided into the following categories:

1) Cylinder: including cylindrical and prism. Prism can be divided into straight prism and oblique prism, and can be divided into triangular prism, quadrangular prism and n prism according to the number of bottom edges; The volume of the prism is equal to the area of the base surface multiplied by the height, i.e., v=sh;

where l is the perimeter of the base chart, s is the area of the base chart, and r is the distance from the center of gravity to the axis).

4) Cross-section: including prisms, tables, oblique truncated cylinders, oblique truncated prisms, oblique truncated cones, ball crowns, ball gaps, etc. Its surface area and volume are generally solved by adding or subtracting from the graph.

Planar geometry.

It can be divided into the following categories:

1) Round: including perfect circle, elliptical, multifocal circle - oval.

2) Polygons: triangles, quadrilaterals, pentagons, etc.

3) Bow: superior arc bow, inferior arc bow, parabolic bow, etc.

4) Multi-arc: crescent-shaped, grain-shaped, Taiji-shaped, gourd-shaped, etc.

Geometry"Explanation in the academic literature: Geometry refers to the geometric outline that specifically describes the model, usually a closed geometry composed of a number of triangles or polygons.

For example, we can hardly tell what shape it is of the two stones that I have in my hand, one of which we can call geometric, and the other of which is square at one end and round at the other.

Basic plane shapes: points, lines, angles, triangles, quadrilaterals (rectangles, squares, parallelograms, diamonds, trapezoids), polygons, circles, etc. Basic stereoscopic graphics:

Cuboids, cubes, cylinders, cones, spheres, prisms, pyramids, bevels, tables, polyhedra, etc.

Triangle, square, rectangle, round, oval, diamond, cylindrical.

Classification of geometry can be divided into (cylinder), (cone), (sphere) according to the characteristics of the geometry; It can also be divided by the (curved) or (flat) of the faces that make up the geometry; One way to classify the faces that make up the geometry is that the sphere itself is one class, and the rest is a class. According to the classification, the ball is a non-expandable surface, and the rest is a deployable surfaceAnother classification method is:

Spheres, cylinders, cones are one class, and the rest are one class. Classification by: The first type is the surface geometry, and the second type is the geometry surrounded by planes.

The third method of classification: spheres, cylinders, cones are one category, and the rest are one category. Classification by:

The first type is revolved surfaces, and the second type is not revolved surfaces.

Circles, squares, rectangles, trapezoids, hearts, parallelograms, triangles, ovals, diamonds, and many more.

Cubes, cuboids, cylinders, etc.

You can use 2B HB to start the draft, you should be relaxed when you start the draft, don't be too rigid in the type, relax a little lightly, and use a pen with a high number of b numbers for dark shadows! 4b, 5b, 6b, 8b, all are OK!

For example, straight triangular prism, straight triangular pyramid.

A figure refers to the shape of an object represented on paper or other planes, and is also short for geometric figure.

Shape refers to the appearance of a thing or figure that is presented by a combination of external faces or lines.

Graphics and shapes are like saying that the appearance of a person and this person is a truth, there is a connection, and the figure is represented by the shape, but it cannot be said that the figure is a shape.

A corner is a figure, and what a corner looks like is its shape.

Explanation of geometry.

Points, lines, polygons, volumes, or combinations thereof. Abbreviated as graphics.

Word decomposition geometry of the solution of the rock Nashi how much is used to ask rhetorical questions about the year of geometry 矣.;; Warring States Policy; Zhao Ce" Luo Fu How old is he.;; Yuefu Poetry Collection; Mo Shang Sang" killed geometry.

Tang Dynasty; Li Coarse Bird did not Chaowei "The Biography of Liu Yi" can be geometric.;; Bright; Liu Ji's "Sincerity Bo Liu Wencheng's Collection of Official Documents" is worth geometry. Geometry abbreviation.

The various shapes abstracted from the physical object are collectively referred to as geometric figures. Geometric figures are divided into three-dimensional figures and plane figures, and the figures whose parts are not in the same plane are called three-dimensional figures; A figure in which all parts are in the same plane is called a planar figure.

Definition: Points, lines, planes, and volumes that help people effectively portray the intricacies of the world, and they are all called geometric shapes.

The various shapes abstracted from the physical object are collectively referred to as geometric figures.

Geometric figures are generally divided into three-dimensional figures and planar figures.

Some parts of a geometric figure that are not in the same plane are called solid figures. Some parts of a geometric figure are in the same plane and are called planar figures.

Geometry:

Definition: Points, lines, planes, and volumes are things that help people effectively portray the intricacies of the world, and they are all called geometric

figure）。

The various shapes abstracted from the physical object are collectively referred to as geometric figures.

Geometric figures are generally divided into three-dimensional figures and planar figures.

Some parts of a geometric figure that are not in the same plane are called solidfigures. Some parts of a geometric figure are in the same plane, called a plane

figure)。

What is the composition of the geometry.