9th Standard Syllabus & Materials
9th Standard
TN 9роЖроорпН ро╡роХрпБрокрпНрокрпБ роХрогро┐родроорпН роЖропродрпНродрпКро▓рпИ ро╡роЯро┐ро╡ро┐ропро▓рпН,роорпБроХрпНроХрпЛрогро╡ро┐ропро▓рпН роорпБроХрпНроХро┐ропрооро╛рой 2,3,&5 роородро┐рокрпНрокрпЖрогрпН ро╡ро┐ройро╛роХрпНроХро│рпН ро╡ро┐роЯрпИроХро│рпБроЯройрпН TN 9th Maths Coordinate Geometry,Trigonometry Important 1 Mark Questions with Answers 2,3,&5 Marks Questions with Answers
NEW9th Standard
TN 9роЖроорпН ро╡роХрпБрокрпНрокрпБ роХрогро┐родроорпН роЕро│ро╡ро┐ропро▓рпН,рокрпБро│рпНро│ро┐ропро┐ропро▓рпН&роиро┐роХро┤рпНродроХро╡рпБ роорпБроХрпНроХро┐ропрооро╛рой 2,3,&5 роородро┐рокрпНрокрпЖрогрпН ро╡ро┐ройро╛роХрпНроХро│рпН ро╡ро┐роЯрпИроХро│рпБроЯройрпН TN 9th Maths Mensuration,Statistics&Probability Important 1 Mark Questions with Answers 2,3,&5 Marks Questions with Answers.
NEW9th Standard
TN 9роЖроорпН ро╡роХрпБрокрпНрокрпБ роЪроорпВроХ роЕро▒ро┐ро╡ро┐ропро▓рпН ро╡ро░ро▓ро╛ро▒рпБ - роЪрпЖро╡рпНро╡ро┐ропро▓рпН роЙро▓роХроорпН роорпБроХрпНроХро┐ропрооро╛рой 2,3,&5 роородро┐рокрпНрокрпЖрогрпН ро╡ро┐ройро╛роХрпНроХро│рпН ро╡ро┐роЯрпИроХро│рпБроЯройрпН TN 9th Social Science HIS - The Classical World Important 1 Mark Questions with Answers 2,3,&5 Marks Questions with Answers.
NEW9th Standard
TN 9роЖроорпН ро╡роХрпБрокрпНрокрпБ роЪроорпВроХ роЕро▒ро┐ро╡ро┐ропро▓рпН ро╡ро░ро▓ро╛ро▒рпБ - родрпКроЯроХрпНроХроХро╛ро▓родрпН родрооро┐ро┤рпНроЪрпН роЪроорпВроХроорпБроорпН рокрогрпНрокро╛роЯрпБроорпНроорпБроХрпНроХро┐ропрооро╛рой 2,3,&5 роородро┐рокрпНрокрпЖрогрпН ро╡ро┐ройро╛роХрпНроХро│рпН ро╡ро┐роЯрпИроХро│рпБроЯройрпН TN 9th Social Science HIS - Early Tamil Society and Culture Important 1 Mark Questions with Answers 2,3,&5 Marks Questions with Answers.
NEW9th Standard
TN 9роЖроорпН ро╡роХрпБрокрпНрокрпБ роЪроорпВроХ роЕро▒ро┐ро╡ро┐ропро▓рпН ро╡ро░ро▓ро╛ро▒рпБ - родрпКро┤ро┐ро▒рпНрокрпБро░роЯрпНроЪро┐ роорпБроХрпНроХро┐ропрооро╛рой 2,3,&5 роородро┐рокрпНрокрпЖрогрпН ро╡ро┐ройро╛роХрпНроХро│рпН ро╡ро┐роЯрпИроХро│рпБроЯройрпН TN 9th Social Science HIS - Industrial Revolution Important 1 Mark Questions with Answers 2,3,&5 Marks Questions with Answers.
NEW9th Standard
TN 9роЖроорпН ро╡роХрпБрокрпНрокрпБ роЪроорпВроХ роЕро▒ро┐ро╡ро┐ропро▓рпН ро╡ро░ро▓ро╛ро▒рпБ - роиро╡рпАрой ропрпБроХродрпНродро┐ройрпН родрпКроЯроХрпНроХроорпН роорпБроХрпНроХро┐ропрооро╛рой 2,3,&5 роородро┐рокрпНрокрпЖрогрпН ро╡ро┐ройро╛роХрпНроХро│рпН ро╡ро┐роЯрпИроХро│рпБроЯройрпН TN 9th Social Science HIS - The Beginning of the Modern AgeImportant 1 Mark Questions with Answers 2,3,&5 Marks Questions with Answers.
Published on: 01/08/2018
Based on the chapter Geometry, some of the important questions are covered in this question paper. The questions are prepared from the book back and the creative questions.
Download 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.
Find the supplement of the following angles.
121°48′
2.
Find the supplement of the following angles.
Right angle
3.
Find the complement of the following angles (1°= 60′ minutes, 1′ = 60′′ seconds)
45°
4.
Find the complement of the following angles (1°= 60′ minutes, 1′ = 60′′ seconds)
27°
5.
Find the complement of the following angles (1°= 60′ minutes, 1′ = 60′′ seconds)
70°
6.
Consider the given pairs of triangles and say whether each pair is that of congruent triangles. If the triangles are congruent, say ‘how’; if they are not congruent say ‘why’ and also say if a small modification would make them congruent:
7.
Consider the given pairs of triangles and say whether each pair is that of congruent triangles. If the triangles are congruent, say ‘how’; if they are not congruent say ‘why’ and also say if a small modification would make them congruent:
8.
In the figure, AB is parallel to CD, find x
9.
In the figure, AB is parallel to CD, find x
10.
Let m || n and l is a transversal Such that ∠1 : ∠2 = 11 : 7. Determine all the eight angles.
11.
The point of concurrency of the medians of a triangle is known as __________
circumcentre
incentre
orthocentre
centroid
12.
Diagonal of which of the following quadrilaterals do not bisect it into two congruent triangles?
rhombus
trapezium
square
rectangle
13.
Which of the following is a formula to find the sum of interior angles of a quadrilateral of n-sides?
\(\frac { n }{ 2 } \) \(\times\) 180
\(\left( \frac { n+1 }{ 2 } \right) \)1800
\(\left( \frac { n-1 }{ 2 } \right) \)180o
(n-2)180o
14.
In a parallelogram \(\angle{A}:\angle{B}=1:2\) Then уДеA ............
30°
60°
45°
90°
15.
If all the four sides of a parallelogram are equal and the adjacent angles are of 120° and 60°, then the name of the quadrilateral is ______
rectangle
square
rhombus
kite
16.
One angle of a parallelogram is a right angle. The name of the quadrilateral is ______
square
rectangle
rhombus
kite
17.
What is the name of a regular polygon of six sides?
Square
Equilateral triangle
Regular hexagon
Regular octagon
18.
The angles of the triangle are 3x–40, x+20 and 2x–10 then the value of x is ________.
40°
35°
50°
45°
19.
If bisectors of ∠A and ∠B of a quadrilateral ABCD meet at O, then ∠AOB is ________.
∠C + ∠D
\(\frac { 1 }{ 2 } (\angle C+\angle D)\)
\(\frac { 1 }{ 2 } \angle C+\frac { 1 }{ 3 } \angle D\)
\(\frac { 1 }{ 3 } \angle C+\frac { 1 }{ 2 } \angle D\).
20.
If the diagonal of a rhombus are equal, then the rhombus is a ________.
Parallelogram but not a rectangle
Rectangle but not a square
Square
Parallelogram but not a square
21.
The correct statement out of the following is ________.
ΔABC ≅ ΔDEF
ΔABC ≅ ΔDEF
ΔABC ≅ ΔFDE
ΔABC ≅ ΔFED
22.
In the given figure CE || DB then the value of x0 is ________.
45°
30°
75°
85°
23.
ABCD is a square, diagonals AC and BD meet at O. The number of pairs of congruent triangles with vertex O are ________.
6
8
4
12
24.
The exterior angle of a triangle is equal to the sum of two ________.
Exterior angles
Interior opposite angles
Alternate angles
Interior angles
25.
It is not possible to construct a triangle when its sides are ____________
8.2 cm, 3.5 cm, 6.5 cm
6.3 cm, 3.1 cm, 3.2 cm
7 cm, 8 cm, 10 cm
4 cm, 6 cm, 6 cm
26.
In a quadrilateral ABCD, ∠A = 72° and ∠C is the supplementary of ∠A. The other two angles are 2x–10 and x + 4. Find the value of x and the measure of all the angles.
27.
The angles of a quadrilateral are in the ratio 2 : 4 : 5 : 7. Find all the angles.
1.
Supplement of 121°48' = 180° - 121°48'
= 58°12′
2.
Supplement of Right angle (90°) = 180° - 90°
= 90°
3.
Complement of 45° = 900-45°
= 45°
4.
Complement of 27° =90° - 27°
= 63°
5.
Complement of 70° = 90° - 70°
=20°
6.
In \(\triangle PXY\ and \triangle PXZ\)
PX is common.
XY = XZ (Given)
PY = PZ (Given)
By SSS congruency
\(\triangle PXY\cong\triangle PXZ\)
7.
In \(\triangle PQR\ and \ \triangle ABC\)
PQ = AB (Given)
RQ = BC (Given)
\(\therefore \triangle ABC\) is congurent to \(\triangle PQR\)
8.
Draw TE || AB.
\(\angle ABT+\angle ETB=180^0(AB||TE)\)
\(48^0+\angle ETB=180^0\)
\(\angle ETB=180^0-48^0=132^0\)
Similarly \(\angle CDT+\angle DTE=180^0\)
\(24^0+\angle DTE=180^0\)
\(\therefore \angle DTE=180^0-24^0\) = 1560
\(\therefore \angle BTE+\angle ETD=132^0+156^0\) = 288°
x = 288°
9.
Through T draw TE|| AB.
\(\therefore \angle BAT+\angle ATE=180^0(AB||TE)\)
\(140^0+\angle ATE=180^0\)
\(\angle ATE=180^0-140^0=40^0\)
Similarly \(\angle ETC+\angle TCD=180^0(TE||CD)\)
\(\angle ETC+150^0=180^0\)
\(\angle ETC=180^0-150^0=30^0\)
\(x=\angle ATE+\angle ETC\)
= 40° + 30° = 70°
x = 70°
10.
\(\angle 1:\angle 2=11:7\)
\(\angle 1+\angle 2=180^0\) (Angle of a straight line)
Divide 180° in the ratio 11 : 7
Total ratio 11 + 7 = 18
\(\angle 1=\frac{11}{18}\times180^0=110^0\)
\(\angle 2=\frac{7}{18}\times180^0=70^0\)
\(\angle 3=\angle 1=110^0\)(Vertically opposite angles)
\(\angle 4=\angle 2=70^0\)(Vertically opposite angles)
\(\angle 5=\angle 1=110^0\)(Corresponding angles)
\(\angle 6=\angle 2=70^0\)(Corresponding angles)
\(\angle 7=\angle 5=110^0\)(Vertically opposite angles)
\(\angle 8=\angle 6=70^0\)(Vertically opposite angles )
\(\therefore\) ∠1 = 110°, ∠2 = 70°, ∠3 = 110°, ∠4 = 70°, ∠5 = 110°, ∠6 = 70°, ∠ 7 = 110° ∠8 = 70°.
11.
(d)
centroid
12.
(b)
trapezium
13.
(d)
(n-2)180o
14.
(b)
60°
15.
(c)
rhombus
16.
(b)
rectangle
17.
(c)
Regular hexagon
18.
(b)
35°
19.
(b)
\(\frac { 1 }{ 2 } (\angle C+\angle D)\)
20.
(c)
Square
21.
(d)
ΔABC ≅ ΔFED
22.
(d)
85°
23.
(a)
6
24.
(b)
Interior opposite angles
25.
(b)
6.3 cm, 3.1 cm, 3.2 cm
26.
\(\angle A=72^0\)
\(\angle C=180^0-72^0\) (\(\angle A\) and \(\angle C\) are supplementary)
= 1080
\(\angle A+\angle B+\angle C+\angle D=360^0\) (Total angles of a quadrilateral)
72o+ 2x -10 +108o+ x + 4 = 360o
3x + 174o = 360o
3x = 360o-174o = 1860
\(x=\frac{186^0}{3}\)
x = 62o
The value of x = 62°
\(\angle B=2x-10\)
= 2(62o) -10
= 124o-10o = 114o
\(\angle D=x+4\)
= 62o+ 4 = 66o
The other angles are 72°, 114°, 108° and 66°.
27.
Let the angles of a quadrilateral be 2x, 4x, 5x, and 7x.
Total angle of a quadrilateral 360°
2x + 4x + 5x + 7x = 360°
18x = 360°
\(x=\frac{360^0}{18}=20^0\)
2x = 2 \(\times\) 20° = 40° ; 4x = 4 \(\times\) 20° = 80° ;
5x = 5 \(\times\) 20° = 100° ; 7x = 7 \(\times\) 20° = 140°
\(\therefore\) The angles of a quadrilateral are 40°, 80°, 100° and 140°.
9th Standard Syllabus & Materials
9th Standard
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NEW9th Standard
TN 9роЖроорпН ро╡роХрпБрокрпНрокрпБ роЪроорпВроХ роЕро▒ро┐ро╡ро┐ропро▓рпН ро╡ро░ро▓ро╛ро▒рпБ - рокрпБро░роЯрпНроЪро┐роХро│ро┐ройрпН роХро╛ро▓роорпН роорпБроХрпНроХро┐ропрооро╛рой 2,3,&5 роородро┐рокрпНрокрпЖрогрпН ро╡ро┐ройро╛роХрпНроХро│рпН ро╡ро┐роЯрпИроХро│рпБроЯройрпН TN 9th Social Science HIS - The Age of Revolutions Important 1 Mark Questions with Answers 2,3,&5 Marks Questions with Answers.
NEW9th Standard
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NEW9th Standard
TN 9роЖроорпН ро╡роХрпБрокрпНрокрпБ роЪроорпВроХ роЕро▒ро┐ро╡ро┐ропро▓рпН ро╡ро░ро▓ро╛ро▒рпБ - роЖроЪро┐роп роЖрокрпНрокро┐ро░ро┐роХрпНроХ роиро╛роЯрпБроХро│ро┐ро▓рпН роХро╛ро▓ройро┐ропро╛родро┐роХрпНроХроорпН роорпБроХрпНроХро┐ропрооро╛рой 2,3,&5 роородро┐рокрпНрокрпЖрогрпН ро╡ро┐ройро╛роХрпНроХро│рпН ро╡ро┐роЯрпИроХро│рпБроЯройрпН TN 9th Social Science HIS - Colonialism in Asia and Africa Important 1 Mark Questions with Answers 2,3,&5 Marks Questions with Answers.
Tamilnadu Stateboard 9th Standard Subjects
Tamilnadu Stateboard Standards
