Construction And Properties Of Triangle

CONSTRUCTION AND PROPERTIES OF TRIANGLE

Name of School: G.S.S. Amloh(b) District: Fatehgarh Sahib Computer Faculty:-Mohan Lal Aggarwal Prepared by:Pravi Goyal ,Pargat singh class 9th

Triangle is a geometrical figure consisting of three points called vertices connected by three sides and forms three angles

CLASSIFICATION OF TRIANGLES

According to side • Scalene triangles • Isosceles triangles • Equilateral triangles

Scalene triangle • Scalene triangles have no equal sides.

Isosceles triangles • Isosceles triangles have two equal sides.

Equilateral Triangle • Equilateral triangles have three equal

According to angles • Acute angle triangles • Right angle triangles • Obtuse angle triangles

Acute Angle Triangle • In Acute triangles, all the angles are less than 90°

Right Angle Triangle • In Right triangles, one angle is equal to 90°

Obtuse Angle Triangle • In Obtuse triangles, one angle is more than 90°

CONSTRUCTION OF EQUILATERAL TRIANGLE

∆ ABC IN WHICH AB=5, BC=5, CA=5 STEP1: Draw a line AB=5

A

5 cm

B

STEP2: Draw arc of 5 cm from A & B which cut at C

A

5 cm

B

STEP3: Join AC & BC

C 5cm

5cm

A

5 cm

B

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