types of triangles rorrikapoora faridkot

8/14/2019 TYPES of TRIANGLES Rorrikapoora Faridkot

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Govt.Sen.Sec.School

Rori Kapura (Faridkot)

PREPARED BY:Mr. Rajiv Kumar Dua ( Math Master)Mr. Jagdev Singh (Math Master)


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Mr. Parmod Kumar Dhir

(Teacher Trainer)Mr. Pankaj Rai Mittal

(Student Trainer)

GUIDED BY:


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1. Construction of a Triangle1

. Construction of a Triangleand its propertiesand its properties

2. Types of Triangels2. Types of Triangels

GOVT. SEN.SEC SCHOOL

RORI KAPURA (FARIDKOT)


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1. Construction of a Triangle1. Construction of a Triangle

and its propertiesand its properties


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Constructionofa Triangle

andits properties

Select an option

Definition of a Triangle

Properties of a Triangle


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D

E

F

I

N

A

T

I

O

N

Triangle is a simple

closed figure made upof three line segments

joined with each other.


andits properties

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Vertex

Angle

Symbolically

we call it asSide

ABC


andits properties

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D

E

F

I

N

A

T

I

O

N


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N

O

T

E

A triangle has:

THREE VERTICES

THREE SIDES

and

THREE ANGLES


andits properties

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D

O

Y

O

U

K

N

O

W

Triangleis a

polygon

withleast number

of sides


andits properties

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P

R

O

P

E

R

TI

E

S

ANGLE SUM PROPERTY

The Sum ofThe Sum of

three angles ofthree angles of

aa

Triangle isTriangle is

always 180always 180o.o.

The Sum ofThe Sum of

three angles ofthree angles of

aa

Triangle isTriangle is

always 180always 180o.o.

Construction of a Triangle

and its properties

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P

R

O

P

E

R

TI

E

S

B

A

C

A B C+ + = 180o


andits properties

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P

R

O

P

E

R

TI

E

S

SUM OF SIDES PROPERTY

The Sum of anytwosidesThe Sum of anytwosidesof a Triangleof a Triangle

is always greateris always greater

thanthirdsidethanthirdside

The Sum of anytwosidesThe Sum of anytwosidesof a Triangleof a Triangle

is always greateris always greater

thanthirdsidethanthirdside

Construction of a Triangle

and its properties

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Point

A point is represented

by a dot by a fine sharp

pencil on the sheet ofa

paperand denote it by

acapital letter A,B,C

etc.

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Angle.

An angle is the union of

two non-collinear rays

with acommon initial

point.The angle formed

by the two rays ABand

AC is denoted by the

symbol angle BAC.

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Triangle.

A plane figure bounded

by three lines is called a

triangle.

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2. Types of Triangle

1. Scalene Triangle.

2. Isosceles Triangle.

3. Equilateral Triangle.

4. Acute Triangle.5. Right-Angled Triangle.

6. Obtuse Triangle.

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1. Scalene Triangle.

A triangle whose no two

sides are equal ,is

called a scalene

triangle.

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2. Isosceles Triangle .

A triangle whose two

sides are equal , is

called isosceles

triangle.

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3.Equilateral Triangle.

A triangle whose all

sides are equal to one

another, is called on

equilateral triangle.

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4.Acute Triangle .

A triangle whose all

angles are acute , is

called anacute -

angled-triangle.

(acute angle is


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5.Right-Angled Triangle.

A triangle whose one

angle is a right angle is

called a right angled-

triangle or right angle.

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6.Obtuse Triangle.

A triangle whose one

angle is obtuse is called

the obtused-angled-

triangled or obtuse

triangle .

(an obtuse angle is

>900 )

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Median.

In a triangle ,the

segment joining the

mid-point ofany side to

the opposite vertex is

called a median .In

triangle ABC, if D is the

mid-point of side BC ,

then AD is the median.

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Altitude.

The line segment drawn

from vertex, which is

perpendicular to the

opposite side is called

the altitude to that

side.In triangle ABC AL

is the altitude of the

side BC .

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BIBILOGRAPHY

1. DIFFERENT BOOKS OF MATHEMATICS

2. MICROSOFT ENCARTA

3. INTERNET

types of triangles rorrikapoora faridkot

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