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CBSE Questions for Class 9 Maths Triangles Quiz 9 - MCQExams.com

In ΔABC and ΔDEF, AB=FD, A=D. The two triangles will be congruent by SAS axiom if :
  • BC=DE
  • AC=EF
  • BC=EF
  • AC=DE
In ΔABC, if A=35 and B=65, then the longest side of the triangle is :
  • AC
  • AB
  • BC
  • None of these
In the given figure, If OA=OB,OD=OC, then ΔAODΔBOC by congruence rule:

87720_3f69271d5d13425f9e48040978676e71.png
  • SSS
  • ASA
  • SAS
  • RHS
In ABC, if AB>BC then:
  • C<A
  • C=A
  • C>A
  • A=B
In ΔABC,AB=76 cm, BC=69 cm and CA=61 cm
the greatest angle ?
  • C
  • A
  • B
  • All are equal
In the given figure, if AB=DC, ABD=CDB, which congruence rule would you apply to prove ΔABD ΔCDB ?
86849_c6c45dd2a7b6431ca525ca81561d0188.png
  • SAS
  • ASA
  • RHS
  • SSS
Two sides of a triangle are of lengths 5 cm and 1.5 cm, then the length of the third side of the triangle cannot be
  • 3.6cm
  • 4.1cm
  • 3.8cm
  • 3.4cm

By which congruency are the following pairs of triangles congruent:

In ΔABC and ΔPQR, AB=PQ, BC=QR and AC=PR

  •  ASA
  •  SSS
  •  AAA
  • ASS
For any triangle ABC, the true statement is
  • AC2=AB2+BC2
  • AC=AB+BC
  • AC>AB+BC
  • AC<AB+BC

State true/false:

If in ΔABC and ΔDEF, AB = DE, BC = DE, BC = EF and B=E, then both the triangles are congruent.


  • True
  • False
In a triangle ABC and DEF, AB=FD and A=D. The two triangles will be congruent by SAS axiom if:
242665.png
  • BC=EF
  • AC=DE
  • AC=EF
  • BC=DE
State true or false:
If two sides and an angle of a triangle are respectively equal to two sides and an angle of another triangle,then the two triangles are always congruent. 
  • True
  • False
Angles opposite to the equal sides of a triangle are equal. 
  • True
  • False
  • Incomplete information
  • None
In triangles ABC and PQR, AB=AC, C=P and B=Q. Then the two triangles are :
242692_2ac95e981e8f4132a618a637e8eeec6d.png
  • Isosceles but not congruent
  • Isosceles and congruent
  • Congruent but not isosceles
  • Neither congruent nor isosceles
If any two sides of a triangle are unequal, then the larger side has the ......... angle opposite to it.
  • Greater
  • Lesser
  • Equal
  • May be greater or lesser
If in two triangles ABC and PQR, AB=QR, A=Q and B=R, then ABC  
  • QRP
  • PQR
  • PRQ
  • None of the above.
If in two triangles ABC and DEF, AB=DF, BC=DE and B=D, then ABC ____.
  • FDE
  • DEF
  • EDF
  • EFD
If the two angles of a triangle are unequal, then the smaller angle has the ....... side opposite to it.
  • Smaller
  • Larger
  • May be smaller may be larger
  • The side will be equal to one of the opposite sides
If the two sides and the ____ angle of one triangle are respectively equal to two sides and the included angle of the other triangle, then the triangles are congruent.
  • Included
  • Excluded
  • Adjacent
  • Any
Which of the following pairs of triangles are congruent?
  • ABC and DEF in which : BC=EF, AC=DF and C=F
  • ABC and DEF in which : AB=PQ, BC=QR and C=R
  • ABC and LMN in which : A=L=900, AB=LM, C=400 and M=500
  • ABC and DEF in which : and B=E=500 and AC=DF
If ____sides of a triangle are respectively equal to the ____ sides of the other triangle, then the triangles are congruent.
  • Three
  • Two
  • One
  • None
In a right triangle, the hypotenuse is the ....... side
  • Largest
  • Shortest
  • Can be largest or shortest
  • None of these
In the ABC,we have A>B>C, then determine the shortest and the longest side of the triangle.
243353.png
  • Shortest side is AB and the longest side is BC
  • Shortest side is BC and the longest side is AB
  • Shortest side is AB and the longest side is AC
  • Shortest side is AC and the longest side is BC
In the figure, AB=CD and A=90o=D. Then 

377041.PNG
  • ΔABCΔDBC by SAS postulate
  • ΔABCΔDCB by RHS postulate
  • ΔABCΔDBC by AAS postulate
  • ΔABCΔDCB by SSS postulate
Two sides of a triangle are 7 and 10 units. Which of the following length can be the length of the third side?
  • 19 cm
  • 17 cm
  • 13 cm
  • 3 cm
In ΔABC, AB = AC and AD is perpendicular to BC. State the property by which ΔADBΔADC.
  • SAS property
  • SSS property
  • RHS property
  • ASA property
In PQR, P=500 and R=700. Name 
i) the shortest side.
ii)the longest side of the triangle
  • i)PQ,

    (ii)QR
  • i)PR,

    (ii)PQ
  • i)QR,

    (ii)PQ
  • i)PQ,

    (ii)PR
In a ΔABC, if B is an obtuse angle, then the longest side is:
  • AB
  • BC
  • AC
  • none
In the following fig. if AB=AC and BD=DC then ADC =
265572_4d065936bff244cf8d76d2608d8a1aee.png
  • 600
  • 1200
  • 900
  • None
Can 6 cm, 5 cm and 3 cm form a triangle?
  • Yes
  • No
  • Sometimes
  • None of these
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