9th Standard Syllabus & Materials
9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -கற்கண்டு (இலக்கணம்) - தொடர் இலக்கணம், ஆகுபெயர் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -விரிவானம் (துணைப்பாடம்) - தாய்மைக்கு வறட்சி இல்லை! Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -கவிதை பேழை (செய்யுள்) - மார்கழி பெருவிழா Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உயிருக்கு வேர்-இலக்கணம் - பகுபத உறுப்பிலக்கணம் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil அமுதென்று பேர் - இலக்கணம்-எழுத்து -அளபெடை Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil அமுதென்று பேர்-துணைப்பாடம் - ஆறாம்திணை Important Questions And Answers Study Material - QB365 Set A
Published on: 13/05/2022
QB365 provides detailed and simple solution for every book back questions in class 9 Maths subject.It will helps to get more idea about question pattern in every book back questions with solution.
latest Book back QuestionsDownload Tamil Nadu 9th Standard Maths question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Maths Test1.
AB and CD are two parallel sides of a cyclic quadrilateral ABCD such that AB = 10 cm, CD = 24 cm and the radius of the circle is 13 cm. Find the shortest distance between the two sides AB and CD
2.
Procedure: Cut off a quadrilateral ABCD in a paper with prescribed dimensions. Mark the mid points P, Q, R and S of the sides AB, BC, CD and DA respectively. By folding the sides appropriately cut off the quadrilateral PQRS. Fold the quadrilateral (i) Does PQ lie on SR? similarly fold the other way and verify QR lies on PS.
Observation
(i) What do you conclude?
(ii) Name the resulting figure?
Draw the following quadrilaterals and join the mid points of all its sides. Find the resultant shape and complete the table.
| Name of the quadrilateral | Shape obtained by joining the midpoints |
| Parallelogram | |
| Rectangle | |
| Square | |
| Kite | |
| Trapezium | |
| Rhombus |
3.
Angle sum for a polygon
Draw any quadrilateral ABCD. Mark a point P in its interior. Join the segments PA, PB, PC and PD. You have 4 triangles now.
How much is the sum of all the angles of the 4 triangles?
How much is the sum of the angles at their vertex, now P?
Can you now find the 'angle sum' of the quadrilateral ABCD?
Can you extend this idea to any polygon?
4.
This is a copy of the tangram puzzle. The tangram puzzle consists of 7 geometric pieces which are normally boxed in the shape·of a square. The pieces, called 'tans', are used to create different patterns including animals, people, numbers, geometric shapes and many more.
You can make several polygons using the pieces in different ways.
5.
Identify which ones are trapeziums and which are not.
6.
Which ones are not quadrilaterals
7.
Which ones are not quadrilaterals?
8.
Identify which ones are parallelograms and which are not.
9.
Identify which ones are parallelograms and which are not.
10.
Find the value of x
1.
In this figure
OE = \(\sqrt { { 13 }^{ 2 }-{ 5 }^{ 2 } } =\sqrt { 169-25 } =\sqrt { 144 } =12cm\)
OF = \(\sqrt { { 13 }^{ 2 }-{ 5 }^{ 2 } } =\sqrt { 169-25 } =\sqrt { 25 } =5cm\)
The shortest distance between = 12 + 5 = 17 cm
2.
3.
The sum of all angles of the 4 triangles is 4 \(\times\) 180 = 720.
The sum of all angles at their vertex P is 360°
The angle sum of quadrilateral ABCD = 720 - 360 = 360°
You can extend this idea to any polygon.
4.
By using the given shapes, students has to make different shapes like birds, house, numbers, animals, rocket etc.
These pictures are called tangram pictures.
5.
It is not a trapezium
6.
It is not a quadrilateral
7.
It is a quadrilateral
8.
It is not a parallelogram
9.
It is not a parallelogram
10.
\(\angle SOA=2x^0\) (Vertically opposite angels are equal)
\(\angle POB+\angle SOA+\angle DOQ=180^0\) (angle of a straight line)
3x° + 2x°+ 4x° = 180°
9x° = 180°
\(x^0=\frac{180}{9}=20^0\)
The value of x = 20°.
9th Standard Syllabus & Materials
9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - திருக்குறள் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - மணிமேகலை Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - ஏறு தழுவுதல் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உயிருக்கு வேர் - தண்ணீர் Important Questions And Answers Study Material - QB365 Set A
Tamilnadu Stateboard 9th Standard Subjects
Tamilnadu Stateboard Standards
