Congruent Triangles
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In each pair of triangles in the following figures, parts bearing indentical marks are congruent. State the test and correspondence of vertices by which triangles in each pair are congruent.
(i)
(ii)
(iii)
(iv)
(v)
If ΔABC≅ΔPQR, then AB is equal to ___.
PR
QR
PQ
Both PR and QR
- True
- False
- 3
- 4
- 5
What are Congruences?
Which of the following is not a criterion for congruence of triangles?
SAS
ASA
SSA
SSS
Which of the following statements is correct?
- Both triangles may be congruent or may not be congruent.
- The two triangles can never be congruent
- The two triangles must be congruent
- None of the above
- PR=3, QR=1
- PR=4, QR=2
- PR=4, QR=1.5
- PR=6, QR=3
- False
- True
- SSS
- SAS
- AAA
- ASA
- △ABC≡△PQR
- △ABC≅△PQR
- △ABC=△PQR
- None of the above
- 3
- 4
- 5
- None of the above
- True
- False
Which congruency criterion could be used only to check for congruency of two right-angled triangles?
ASA congruency
SAS congruency
RHS congruency
SSS congruency
△ABC is an isosceles triangle in which AB = AC. Side BA is produced to D such that AD = AB. ∠BCD is equal to ____.
90∘
45∘
37∘
Cannot be determined
.
- FG
- XV
- GE
- VW
- EF
- WX
- ∠F
- ∠E
- ∠V
- ∠X
- False
- True
- x=22°, y=44°
- x=22°, y=88°
- x=44°, y=22°
- x=44°, y=88°
StepsReasonsi) PM=QM(i)ii) ∠PMA=∠QMA(ii)iii) AM=AM(iii)iv)ΔAMP≅ΔAMQ(iv)
- AB
- AC
- BD and DC
- AD
If two triangles are equal in perimeter, they must be congruent.
Which of the following are correct?
- AB=PQ
- AC=QR
- m∠A= m∠R
- m∠B= m∠Q
(A) DE=12cm, ∠F=50∘
(B) DE=12cm, ∠F=100∘
(C) EF=12cm, ∠D=100∘
(D) EF=12cm, ∠D=30∘
Two regular polygons each having sides are ____________ (Similar/Not Similar)
- False
- True
In the given figure, AD=BC. What is the length of AB if DC=4 cm?
5 cm
4 cm
3 cm
Can’t find
(A) DE=12cm, ∠F=50∘
(B) DE=12cm, ∠F=100∘
(C) EF=12cm, ∠D=100∘
(D) EF=12cm, ∠D=30∘