Construction Of Triangle (first)

GOVT HIGH SCHOOL, GALWATTI

PROJECT

ON

CONSTRUCTION & PROPERTIES OF A TRIANGLE

CONTENTS Properties

Triangle

of a

Construction

Triangle

of a

Properties of a Triangle Three properties of a triangle are: •

Sum of three angles of a triangle is 1800.

Properties of a Triangle

•Exterior angle of a triangle is equal to the sum of two opposite interior angles of a triangle.

Properties of a Triangle •Sum of the length of two sides of a triangle is greater than the length of the third side of a triangle.

Construction of a Triangle with two sides and the included angle given

Construct a triangle when two of its sides are 6cm and 4cm and the included angle is of measure 600 

Construction of a Triangle with two sides and the included angle given  Step

1: Draw a line BC of 6cm.

B

C 6cm

Construction of a Triangle with two sides and the included angle given 

Step 2 : Now at point B, make an angle of 600 with protractor. X

600 B

6cm

C

Construction of a Triangle with two sides and the included angle given • Step 3: Keep your compass at a point B and make an arc of 4cm on line BX. X

4cm

600 B

6cm

C

Construction of a Triangle with two sides and the included angle given

 Step

4: Name the intersection of line and the arc as A. X A 4cm

600 B

6cm

C

Construction of a Triangle with two sides and the included angle given

 Step

5: Join AC.

X A

4cm

600 B

6cm

C

ABC is the required triangle.

X A

4cm

600 B

6cm

C

Prepared By: Sandeep Kaur Preet Kaur Lakhvir Laur Pavitar Kaur Students of 8th Class Govt High School, Galwatti.

References: Text Book of 7th Class Guided By: Ms. Ritu Garg (Teacher Trainer) Mrs. Anu Manro (Student Trainer)