Samacheer Kalvi 9th Maths Chapter 7 Mensuration Notes PDF Download: Tamil Nadu STD 9th Maths Chapter 7 Mensuration Notes

Samacheer Kalvi 9th Maths Chapter 7 Mensuration Notes PDF Download: Tamil Nadu STD 9th Maths Chapter 7 Mensuration Notes

Samacheer Kalvi 9th Maths Chapter 7 Mensuration Notes PDF Download: Students of class can download the Samacheer Kalvi 9th Maths Chapter 7 Mensuration Notes PDF Download from our website. We have uploaded the Samacheer Kalvi 9th Maths Chapter 7 Mensuration notes according to the latest chapters present in the syllabus. Download Samacheer Kalvi 9th Maths Chapter 7 Mensuration Chapter Wise Notes PDF from the links provided in this article.

Samacheer Kalvi 9th Maths Chapter 7 Mensuration Notes PDF Download

We bring to you specially curated Samacheer Kalvi 9th Maths Chapter 7 Mensuration Notes PDF which have been prepared by our subject experts after carefully following the trend of the exam in the last few years. The notes will not only serve for revision purposes, but also will have several cuts and easy methods to go about a difficult problem.

Board	Tamilnadu Board
Study Material	Notes
Class	Samacheer Kalvi 9th Maths
Subject	9th Maths
Chapter	Chapter 7 Mensuration
Format	PDF
Provider	Samacheer Kalvi Books

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Tamilnadu Samacheer Kalvi 9th Maths Solutions Chapter 7 Mensuration Additional Questions

Exercise 7.1

Question 1.
Using Heron’s formula, find the area of a triangle whose sides are 41 m, 15 m, 25 m.
Solution:



Question 2.
Find the area of an equilateral triangle whose perimeter is 150 m.
Solution:
3a = 150

Question 3.
Find the area of a quadrilateral whose sides are PQ = 15 cm, QR = 8 cm, RS = 25 cm, PS = 12 cm and LQ = 90°
Solution:

Exercise 7.2

Question 1.
Find the TSA and LSA of a cuboid whose length, breadth and height are 10 cm, 12 cm and 14 cm respectively.
Solution:
TSA = 2 (lb + bh + Ih)
= 2 (10 × 12 + 12 × 14 + 10 × 14) = 2 (120 + 168 + 140) = 856 cm²
LSA = 2 (bh + Ih) = 2 (12 × 14 + 10 × 14) = 2 (168 + 140) =2 (308) = 616 cm²

Question 2.
A cuboid has total surface area of 40 m² and its lateral surface area is 26 m². Find the area of its base.
Solution:

Question 3.
Find the surface area of a cube whose edge is
(i) 27 cm
(ii) 3 cm
(iii) 6 cm
(iv) 2.1 cm
Solution:
(i) TSA = 6a² = 6 × 27² = 6 × 729 = 4374 cm²
(ii) TSA = 6a² = 6 × 3² = 54 cm²
(iii) TSA = 6a² = 6 × 6² = 6 × 36 = 216 cm²
(iv) TSA = 6a² = 6 × 2.1² = 6 × 4.41 = 26.46 cm²

Exercise 7.3

Question 1.
Find the volume of a cube whose surface area is a 96 cm².
Solution:
6a² = 96 cm²

a = 6
Volume = a³ = 6³ = 36 × 6 = 216 cm³

Question 2.
The volume of a cuboid is 440 cm³ and the area of its base is 88 cm², find its height.
Solution:
l × b × h = 440 cm³

Question 3.
How many 3 metre cubes can be cut from a cuboid measuring 18 m × 12 m × 9 m?
Solution:

Question 4.
The outer dimensions of a closed wooden box are 10 cm by 8 cm by 7 cm. Thickness
of the wood is 1 cm³. Find the total cost of wood required to make box if 1 cm³ of wood costs ₹ 2.00?
Solution:
Volume of wood = 12 × 10 × 9 – 10 × 8 × 7 = 1080 – 560 = 520 cm³ × 2.00 = ₹ 1040

How to Prepare using Samacheer Kalvi 9th Maths Chapter 7 Mensuration Notes PDF?

Students must prepare for the upcoming exams from Samacheer Kalvi 9th Maths Chapter 7 Mensuration Notes PDF by following certain essential steps which are provided below.

• Use Samacheer Kalvi 9th Maths Chapter 7 Mensuration notes by paying attention to facts and ideas.
• Pay attention to the important topics
• Refer TN Board books as well as the books recommended.
• Correctly follow the notes to reduce the number of questions being answered in the exam incorrectly
• Highlight and explain the concepts in details.

Samacheer Kalvi 9th Maths All Chapter Notes PDF Download

• Samacheer Kalvi 9th Maths Chapter 1 Set Language Notes PDF Download: Tamil Nadu STD 9th Maths Chapter 1 Set Language Notes
• Samacheer Kalvi 9th Maths Chapter 2 Real Numbers Notes PDF Download: Tamil Nadu STD 9th Maths Chapter 2 Real Numbers Notes
• Samacheer Kalvi 9th Maths Chapter 3 Algebra Notes PDF Download: Tamil Nadu STD 9th Maths Chapter 3 Algebra Notes
• Samacheer Kalvi 9th Maths Chapter 4 Geometry Notes PDF Download: Tamil Nadu STD 9th Maths Chapter 4 Geometry Notes
• Samacheer Kalvi 9th Maths Chapter 5 Coordinate Geometry Notes PDF Download: Tamil Nadu STD 9th Maths Chapter 5 Coordinate Geometry Notes
• Samacheer Kalvi 9th Maths Chapter 6 Trigonometry Notes PDF Download: Tamil Nadu STD 9th Maths Chapter 6 Trigonometry Notes
• Samacheer Kalvi 9th Maths Chapter 7 Mensuration Notes PDF Download: Tamil Nadu STD 9th Maths Chapter 7 Mensuration Notes
• Samacheer Kalvi 9th Maths Chapter 8 Statistics Notes PDF Download: Tamil Nadu STD 9th Maths Chapter 8 Statistics Notes
• Samacheer Kalvi 9th Maths Chapter 9 Probability Notes PDF Download: Tamil Nadu STD 9th Maths Chapter 9 Probability Notes

Frequently Asked Questions on Samacheer Kalvi 9th Maths Chapter 7 Mensuration Notes

How to use Samacheer Kalvi 9th Maths Chapter 7 Mensuration Notes for preparation??

Read TN Board thoroughly, make separate notes for points you forget, formulae, reactions, diagrams. Highlight important points in the book itself and make use of the space provided in the margin to jot down other important points on the same topic from different sources.

How to make notes for Samacheer Kalvi 9th Maths Chapter 7 Mensuration exam?

Read from hand-made notes prepared after understanding concepts, refrain from replicating from the textbook. Use highlighters for important points. Revise from these notes regularly and formulate your own tricks, shortcuts and mnemonics, mappings etc.