• Skip to main content
  • Skip to secondary menu
  • Skip to primary sidebar
  • Skip to footer

CBSE Tuts

CBSE Maths notes, CBSE physics notes, CBSE chemistry notes

  • NCERT Solutions
    • NCERT Solutions for Class 12 English Flamingo and Vistas
    • NCERT Solutions for Class 11 English
    • NCERT Solutions for Class 11 Hindi
    • NCERT Solutions for Class 12 Hindi
    • NCERT Books Free Download
  • TS Grewal
    • TS Grewal Class 12 Accountancy Solutions
    • TS Grewal Class 11 Accountancy Solutions
  • CBSE Sample Papers
  • NCERT Exemplar Problems
  • English Grammar
    • Wordfeud Cheat
  • MCQ Questions

Verify that in a Triangle, Longer Side has the Greater Angle Experiment Class 9 Maths Practical NCERT

The experiment to determine Verify that in a Triangle, Longer Side has the Greater Angle are part of the Class 9 Maths Lab Manual provides practical activities and experiments to help students understand mathematical concepts effectively. It encourages interactive learning by linking theoretical knowledge to real-life applications, making mathematics enjoyable and meaningful.

Maths Lab Manual Class 9 CBSE Verify that in a Triangle, Longer Side has the Greater Angle Experiment

Determine Verify that in a Triangle, Longer Side has the Greater Angle Class 9 Practical

OBJECTIVE

To verify experimentally that in a triangle, the longer side has the greater angle opposite to it.

Materials Required

  1. Cardboard
  2. Coloured glazed papers
  3. White paper
  4. Tracing paper
  5. Scissors
  6. Geometry box
  7. Sketch pens
  8. Adhesive

Prerequisite Knowledge
Concept of triangle and its properties.

Theory
For concept of triangle and its properties refer to Activity 12.

Procedure

  1. Take a cardboard of suitable size and by using adhesive, paste a white paper on it.
  2. Cut out a ΔABC from a glazed paper and by using adhesive, paste it on cardboard, (see Fig. 15.1)
    NCERT Class 9 Maths Lab Manual - Verify that in a Triangle, Longer Side has the Greater Angle 1
  3. Measure the lengths of all the three sides of ΔABC and identify that which of them is longest.
  4. All the three angles of a triangle are to be marked, (see Fig. 15.2)
    NCERT Class 9 Maths Lab Manual - Verify that in a Triangle, Longer Side has the Greater Angle 2
  5. Using a tracing paper, make the cut out of the angle opposite to the longest side SC, i.e. ∠A. (see Fig. 15.3)
    NCERT Class 9 Maths Lab Manual - Verify that in a Triangle, Longer Side has the Greater Angle 3
  6. Compare the cut out of the angle with remaining angles. (see Fig. 15.4)
    NCERT Class 9 Maths Lab Manual - Verify that in a Triangle, Longer Side has the Greater Angle 4

Demonstration
We came to know that ∠A > ∠B and ∠A > ∠C , BC > AC,
So, we get since ∠A > ∠B
Also, BC > AB, since ∠A > ∠C
Thus, we observe that the angle belongs to longer side is greater than the angle opposite to other side.

Observation
Length of side AB = ……….. , Length of side BC = ………. , Length of side CA = ………… ,
Measure of the angle opposite to the longest side = …………. ,
Measure of the other two angles = …………… and ………. ,
The angle opposite to the …………. side ……….. is than either of the other two angles.

Result
We have verified experimentally that in a triangle, the longest side has the greater angle opposite to it.

Application
The result can be useful in different geometrical problems.

Viva Voce
Question 1:
In the right angled triangle, which one is the longest side?
Answer:
Hypotenuse

Question 2:
Does sum of any two sides of a triangle is always smaller than the third side?
Answer:
No, because the sum of any two sides of a triangle is always greater than the third side.

Question 3:
Is it possible to draw a triangle having sides 7 cm, 3 cm and 10 cm?
Answer:
No, because the sum of any two sides of a triangle is always greater than the third side.

Question 4:
Which type of triangle, have any two sides equal?
Answer:
Isosceles triangle

Question 5:
Which type of triangle, have all sides equal?
Answer:
Equilateral triangle

Question 6:
Does the longer side has the smaller angle opposite to it in a triangle?
Answer:
No, the longer side has the greater angle opposite to it in a triangle.

Question 7:
If in ΔABC, ∠A > ∠B, then what can you say about the opposite sides of ∠A and ∠B?
Answer:
BC > AC, because ∠A is greater than ∠B, so side opposite to ∠A will also be greater than the side opposite to ∠B.

Question 8:
Which type of triangle, have all sides unequal?
Answer:
Scalene triangle

Suggested Activity
Verify experimentally the relation between unequal sides of a triangle and the angles opposite to them.

Math LabsMath Labs with ActivityMath Lab ManualScience LabsScience Practical Skills

NCERT Class 9 Maths Lab Manual 

  • Determine Construct a Square Root Spiral Class 9 Experiment
  • Determine Represent Some Irrational Numbers on the Number Line Class 9 Experiment
  • Determine Verify the Algebraic Identity (a+b)² = a² + 2ab+b² Class 9 Experiment
  • Determine Verify the Algebraic Identity (a-b)² = a²- 2ab+b² Class 9 Experiment
  • Determine Verify the Algebraic Identity a² – b² = (a+b) (a-b) Class 9 Experiment
  • Determine Verify the Algebraic Identity(a+b+c)² = a²+b²+c²+2ab+2bc+2ca Class 9 Experiment
  • Determine Verify the Algebraic Identity (a+b)³ = a³+b³+ 3a²b + 3ab² Class 9 Experiment
  • Determine Verify the Algebraic Identity (a – b)³ = a³ – b³ – 3ab (a – b) Class 9 Experiment
  • Determine Verify the Algebraic Identity a³+b³ = (a+b) (a²-ab+b²) Class 9 Experiment
  • Determine Verify the Algebraic Identity a³-b³ = (a-b) (a²+ab+b²) Class 9 Experiment
  • Determine Verify that if Two Lines Intersect each Other Class 9 Experiment
  • Determine Verify that the Sum of the Angles of a Triangle is 180° Class 9 Experiment
  • Determine Verify Exterior Angle Property of a Triangle Class 9 Experiment
  • Determine Verify the Different Criteria for Congruency of Triangles Class 9 Experiment
  • Determine Verify that in a Triangle, Longer Side has the Greater Angle Class 9 Experiment
  • Determine Find the Values of Abscissae Class 9 Experiment
  • Determine Find a Hidden Picture by Plotting Class 9 Experiment

Primary Sidebar

NCERT Exemplar problems With Solutions CBSE Previous Year Questions with Solutoins CBSE Sample Papers
  • The Summer Of The Beautiful White Horse Answers
  • Job Application Letter class 12 Samples
  • Science Lab Manual Class 9
  • Letter to The Editor Class 12 Samples
  • Unseen Passage For Class 6 Answers
  • NCERT Solutions for Class 12 Hindi Core
  • Invitation and Replies Class 12 Examples
  • Advertisement Writing Class 11 Examples
  • Lab Manual Class 10 Science

Recent Posts

  • Understanding Diversity Question Answer Class 6 Social Science Civics Chapter 1 NCERT Solutions
  • Our Changing Earth Question Answer Class 7 Social Science Geography Chapter 3 NCERT Solutions
  • Inside Our Earth Question Answer Class 7 Social Science Geography Chapter 2 NCERT Solutions
  • Rulers and Buildings Question Answer Class 7 Social Science History Chapter 5 NCERT Solutions
  • On Equality Question Answer Class 7 Social Science Civics Chapter 1 NCERT Solutions
  • Role of the Government in Health Question Answer Class 7 Social Science Civics Chapter 2 NCERT Solutions
  • Vital Villages, Thriving Towns Question Answer Class 6 Social Science History Chapter 9 NCERT Solutions
  • New Empires and Kingdoms Question Answer Class 6 Social Science History Chapter 11 NCERT Solutions
  • The Delhi Sultans Question Answer Class 7 Social Science History Chapter 3 NCERT Solutions
  • The Mughal Empire Question Answer Class 7 Social Science History Chapter 4 NCERT Solutions
  • India: Climate Vegetation and Wildlife Question Answer Class 6 Social Science Geography Chapter 8 NCERT Solutions
  • Traders, Kings and Pilgrims Question Answer Class 6 Social Science History Chapter 10 NCERT Solutions
  • Environment Question Answer Class 7 Social Science Geography Chapter 1 NCERT Solutions
  • Understanding Advertising Question Answer Class 7 Social Science Civics Chapter 7 NCERT Solutions
  • The Making of Regional Cultures Question Answer Class 7 Social Science History Chapter 9 NCERT Solutions

Footer

Maths NCERT Solutions

NCERT Solutions for Class 12 Maths
NCERT Solutions for Class 11 Maths
NCERT Solutions for Class 10 Maths
NCERT Solutions for Class 9 Maths
NCERT Solutions for Class 8 Maths
NCERT Solutions for Class 7 Maths
NCERT Solutions for Class 6 Maths

SCIENCE NCERT SOLUTIONS

NCERT Solutions for Class 12 Physics
NCERT Solutions for Class 12 Chemistry
NCERT Solutions for Class 11 Physics
NCERT Solutions for Class 11 Chemistry
NCERT Solutions for Class 10 Science
NCERT Solutions for Class 9 Science
NCERT Solutions for Class 7 Science
MCQ Questions NCERT Solutions
CBSE Sample Papers
NCERT Exemplar Solutions LCM and GCF Calculator
TS Grewal Accountancy Class 12 Solutions
TS Grewal Accountancy Class 11 Solutions