NCERT Solutions for Class 7 Maths Chapter 7 Congruence of Triangles Ex 7.1
NCERT
Solutions for Class 7 Maths Chapter 7 Congruence of Triangles Ex 7.1 are the part of NCERT Solutions
for Class 7 Maths. Here you can find the NCERT Solutions for Class 7 Maths
Chapter 7 Congruence of Triangles Ex 7.1.
- NCERT Solutions for Class 7 Maths Chapter 7 Congruence of Triangles Ex 7.1
- NCERT Solutions for Class 7 Maths Chapter 7 Congruence of Triangles Ex 7.2
Ex 7.1 Class 7 Maths Question 1.
Complete the following statements:(a) Two line segments are congruent if ___________.
(b) Among the congruent angles, one has a measure of 70°, the measure of the other angle is ___________.
(c) When we write ∠A = ∠B, we actually mean ____________.
Solution:
(a) Two
line segments are congruent if they have the same length.
(b) Among the congruent angles, one has a measure of 70°, the measure of the
other angle is 70°.
(c) When we write ∠A = ∠B, we actually mean m ∠A = m ∠B.
Ex 7.1 Class 7 Maths Question 2.
Give any two real-life examples for congruent shapes.Solution:
1. Shaving blades of the same packet.
2. Biscuits of the same packets.
Ex 7.1 Class 7 Maths Question 3.
If ∆ABC ≅ ∆FED under the correspondence ABC ⟷ FED, write all the corresponding congruent parts of the triangles.Solution:
Given: ∆ABC
≅ ∆FED with
correspondence ABC ⟷ FED
∴ The
corresponding congruent parts of the triangles:
AB ⟷ FE, BC ⟷ ED, AC ⟷ FD, ∠A ⟷ ∠F, ∠B ⟷ ∠E, ∠C ⟷ ∠D
Ex 7.1 Class 7 Maths Question 4.
If ∆DEF ≅ ∆BCA. Write the part of ∆BCA that correspond to(i) ∠E
(ii) EF
(iii) ∠F
(iv) DF
Solution:
Given: ∆DEF
≅ ∆BCA
(i) ∠E ⟷ ∠C
(iii) EF ⟷ CA
(ii) ∠F ⟷ ∠A
(iv) DF ⟷ BA
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