Caed Lab1 and Lab2

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COMPUTER AIDED ENGINEERING DESIGN 

LAB ACTIVITY NO:01

Object: Draw different types of lines by using paintbrush.

Line: Def: One dimension geometrical shape is called line. Types of line in

CAD are

• Out line or principle line: It is thick and constituent. These lines are useto represent visual ages and boundary component.

• Dotted line or dashed line: Interior is hidden ages and surface is known by dashed line. They are of medium thickness and made up of short

dashed of approximately equal length.

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• Centerline : They are thin and long as chain line composed of alternately

long and short dashed.

• These are use to show the axis of cylindrical, conical and sphere objects.

These are also use to indicate center of circle and arcs.

• Dimension line: These are continues and thin lines. These lines are usefor variety of purpose like showing dimension of objects. These lines

have pointed arrows at their ends.

• Cutting plane line:- These are thin long chain continuous that is thick at

only ends.These lines are use to show location of cutting planes.

• Short break line:- These lines are continuous, thin and wavy. They are

drawn free hand and are use to show a short break or irregular boundaries.

• Long break line:- These are thin ruled with short zigzags. They are use to

show long breaks.

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LAB ACTIVITY NO#02

OBJECT: Draw different shapes by using paintbrush.

Polygon : - A polygon is multisided plane figure having more than two sides is

called polygon. If side of polygon are equal than it is called regular polygon.The sum of angle inside polygon calculated by

S = (n-2)*1800

Where n = no: of sides.

In geometry a polygon is traditionally a plane figure that isbounded by a closed path or circuit , composed of a finitesequence of straight line segments

Triangle:-

A triangle is three sides polygon.

• A triangle having no two sides equal is called scalene triangle.

• A triangle having two sides equal is called isosceles triangle.

• A triangle having all sides equal is equilateral triangle.

• A triangle in which one angle is 90 is called right angle.

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A triangle is one of the basic shapes of geometry: a polygon with three corners or 

vertices and three sides or edges which are line segments. A triangle with vertices

 A,  B, and C  is denoted  ABC .

Quadrilateral:- 

A quadrilateral is four sides polygon of any shape. The sum of interior angle of quadrilateral is 360.

In Euclidean plane geometry, a quadrilateral is a polygon with four sides (or 'edges') and four vertices or corners. Sometimes, the term quadrangle is used, by

analogy with triangle, and sometimes tetragon for consistency with pentagon (5-

sided), hexagon (6-sided) and so on. The word quadrilateral is made of the words

quad (meaning "four") and lateral (meaning "of sides").

Types of quadrilateral 

• Square :

• Four sides angle are equal.

• Opposite sides are parallel.

• Area is equal to B*H.• In geometry, a square is a regular  quadrilateral. This means that it has four 

equal sides and four equal angles (90-degree angles, or right angles). A

square with vertices ABCD would be denoted  ABCD.

• Rectangle :

• Opposite sides are equal.

• Four angles are equal.

• Opposite sides are parallel.

• Area = H*B.

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• In Euclidean plane geometry, a rectangle is any quadrilateral with four right

angles. The term "oblong" is occasionally used to refer to a non-square

rectangle. A rectangle with vertices ABCD would be denoted as  ABCD.

• Rhombus :

• Four sides are equal.

• Opposite sides are parallel.

• Adjacent sides join at oblique angle.• Area = B*H.• In geometry, a rhombus or  rhomb is a quadrilateral whose four sides all

have the same length. The rhombus is often called a diamond, after the

diamonds suit in playing cards, or a lozenge, though the latter sometimes

refers specifically to a rhombus with a 45° angle.

• Rhomboid:• Four sides are not equal.

• Opposite sides are parallel.

• Adjacent sides join at oblique angle.

• Area= H*B

.

Traditionally, in two-dimensional geometry, a rhomboid is a parallelogram in which adjacent sides are of unequal lengths and angles are oblique.

• Trapezoid:

• Quadrilateral with one pair of side parallel.

• Area=(B+C) H/2.• In geometry, a quadrilateral with one pair of parallel sides is referred to as a

trapezoid in American English and as a trapezium in English outside North

America. A trapezoid with vertices ABCD is denoted   ABCD or ⏢  ABCD.5 

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• Trapezium:• Quadrilateral with no side parallel

• Area=(Hahn) +bH+Ch/2

Circle: It is the combination of points having common distance from center. It

is constructed by swinging a radius from a fix point through 360.

• Area = 3.14r*r 

GEOMETRICAL SOLIDS 

Polyhedral:-A polyhedral is defined as a solid bounded by planes called

faces. When all the faces are equal and regular the polyhedral is said to be

regular. Five commonly use polyhedral are

• Tetrahedral.

• Hexahedron.

• Octahedron.

• Dodecahedron.

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• Icosahedrons.

• Tetrahedron : Four equal faces, each an equilateral triangle.

Hexahedron: Six sides.

Octahedron :  It is eight equal equilateral triangles as faces.

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Dodecahedron: It has twelve equal and irregular pentagons as faces.Icosahedrons: It has twenty faces all equilateral triangle.

PRISM:

A prism is two parallel bases of equal shape connected by side thatare parallelograms. The line from the center of one base percent of other base

is axis of prism. If its axis is perpendicular to base the prism is said to be

right prism. If its axis is not perpendicular to base prism is called oblique prism. A Prism that has been cut of to form a base not parallel to the other is

truncated prism. A parallel pied is a prism with base that are either rectangleare parallelogram.

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• PYRAMIDS:

A pyramid is a solid with polygon as a base and triangle faces that

converge at a vertex. The line from vertex to the center of the base is theaxis. If its axis is perpendicular to the base the pyramid is a right pyramid. If its axis is not perpendicular to the base the pyramid is an oblique pyramid. A

truncated pyramid is called frustum of pyramid.

  CLYINDERS: 

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A line forms a cylinder or an element is called a

generatrix that moves about the circle while remaining parallel to its axis.The axis of a cylinder connects the center axis to each end of a cylinder. If 

axis is perpendicular to the bases it is the altitude of right cylinder. If axis

does not make 90-degree angle with the base the cylinder is oblique cylinder.

• CONES:

A cone is formed is by a generatrix one end which move about thecylinder base while the other end remain at a fix vertex. The line from the

center of the base to the vertex is the axis. If its axis is perpendicular to the

 base the cone is a right cone. A truncated cone is

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• SPHERE :Revolving a circle about it diameter to form a sohere

generates a sphere.

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