CBSE Sample Questions Papers Maths Ch: Triangle

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C.B.S.E.-2012-Sample-Papers-for-IX-Mathematics

C.B.S.E.2012-Sample-Papers For SA-1     IX-Physics: Chemistry : Biology : Mathematics

C.B.S.E.-2012-Sample-Papers-for-IX-Physics-(5-Sets)-Summative-Assessement-I

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C.B.S.E.-2012-Sample-Papers-for-IX-Chemistry-(5-Sets)-Summative-Assessement-I

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C.B.S.E.-2012-Sample-Papers-for-IX-Biology-(5-Sets)-Summative-Assessement-I

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C.B.S.E.-2012-Sample-Papers-for-IX-Science  Set-1 -Summative-Assessment-I

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C.B.S.E.-2012-Sample-Papers-for-IX-Science  Set-2 -Summative-Assessment-I

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C.B.S.E.-2012-Sample-Papers-for-IX-Science  Set-3 -Summative-Assessment-I

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C.B.S.E.-2012-Sample-Papers-for-IX-Mathematics  Set-1 -Summative-Assessment-I

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C.B.S.E.-2012-Sample-Papers-for-IX-Mathematics  Set-2 -Summative-Assessment-I

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C.B.S.E.-2012-Sample-Papers-for-IX-Mathematics  Set-3 -Summative-Assessment-I

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Class-ix mathematics formative Assignment

SECTION A (4 x 1M= 4M)

1. In the given figure fig. 9.1, ABCD is a parallelogram and AEB is a triangle. If Ar (ABCD) = 172.6cm²,

 then Ar ( ABE) =_________  (a) 86.3cm2 (b) 172.6cm2 (c) 345.2cm2 (d) cannot be determined.

2. In the given figure fig. 9.2, chord AB at a distance of 9cm from the center O of the given circle. If radius of the circle is 41cm, length of chord AB is:         

(a) 40cm (b) 80cm (c) 50cm (d) cannot be determined

3. In fig. 9.3 ABCD is a parallelogram, AP ^ DC and CQ ^ AD. If AB = 10cm, AD = 8cm and AP = 8cm then 

CQ = ----                                           

(a) 16cm (b) 10cm (c) 8 cm (d) none of these.

4. In fig. 9.4, If O is the center of the circle and AB = CD, then OL : OM = __ (a) 2:1 (b) 1:2 (c) 1:1 (d) none of these.

                                                                 

 SECTION B (3 x 2M = 6M)

5. in fig. 9.5, A and B are points on sides PQ and QR of parallelogram PQRS. Show that Ar (ARS) = Ar(PBS)                                                                                                                              

6. In fig. 9.6, AB and BC are two chords of a circle with centre O such that <ABO = <CBO.  Show that AB = BC

7. Construct the angle of measurement 22½ ° 

                                                                                

SECTION C (2 x 3M = 6M)      

                                                  

8. A line l parallel to side BC of ABC meets AB at X and AC at Y. Also lines parallel to AB through C and AC through B meets line l at E and F respectively. 

Then prove that Ar (ABF) = Ar (ACE).

9. In fig. 9.7, O is the centre of the circle. Determine ÐDAC, ÐACB, ÐADE.      

   

 SECTION D (1 x 4M = 4M)

10. Prove that the angle subtended by an arc at the centre is double the angle subtended by it at any point on the remaining part of the circle.                                                                                                      

                                           (OR),

In fig. 9.8, P is a point in the interior of a parallelogram ABCD. Show that 

1) Ar (APB) + Ar (PCD) = ½ Ar(ABCD)       

2) Ar(APD) + Ar(PBC) = Ar(APB) + Ar(PCD)

Sample Paper 2011-2012 | First Term | Mathematics| 9th

CBSE Test sample paper- IX Mathematics (Congruent triangle)

IX Mathematics (Congruent triangle)

1. If one angle of a triangle is equal to the sum of the other two angles, then the triangle is

(A) an isosceles triangle (B) an obtuse triangle (C) an equilateral triangle (D) a right triangle
2. An exterior angle of a triangle is 105° and its two interior opposite angles are  equal. Each of these equal angles is
(A) 37+ 1/2°  (B)52+ 1/2° (C) 72+ 1/2° (D) 75°
3. The angles of a triangle are in the ratio 5 : 3 : 7. The triangle is 
(A) an acute angled triangle (B) an obtuse angled triangle  (C) a right triangle (D) an isosceles triangle
4 . If one of the angles of a triangle is 130°, then the angle between the bisectors of  the other two angles can be
(A) 50° (B) 65° (C) 145° (D) 155°
5. The sum of two angles of a triangle is equal to its third angle. Find the third angles.
(a) 900  (b) 450 (c) 600 (d) 700                                                     

                                                            Section B

Sampe Paper Class 9 SA1 Mathematics (2011-2012)

Sample_paper_2011-12--1

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sqp_ma_ix_i-20011-12.pdf

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Sample _paper_with_marking_scheme_science-1

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9th_science_sa-1-sample_paper_2011-12--2.pdf

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9th_science-SA-1_physics-sample-paper-2012.pdf

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