NCERT Solutions for Class 7 Maths Chapter 7 Congruence of Triangles Ex 7.1, are part of NCERT Solutions for Class 7 Maths. Here we have given 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
Question 1.
Complete the following statements:
(a) Two line segments are congruent if….
(b) Among two 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 two 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.
Question 2.
Give any two real-life examples for congruent shapes.
Solution:
Two one-rupee coins, two ten-rupee notes.
Question 3.
If ∆ ABC = ∆ FED under the correspondence ABC ↔ FED, write all the corresponding congruent parts of the triangles.
Solution:
Corresponding vertices : A and F ; B and E ; C and D.
Corresponding sides : \(\overline { AB } \) and \(\overline { FE } \) ; \(\overline { BC } \) and \(\overline { ED } \); \(\overline { CA } \) and \(\overline { DF } \).
Corresponding angles : ∠A and ∠F ; ∠B and ∠E ; ∠C and ∠D.
Question 4.
If ∆ DEF = ∆ BCA, write the part(s) of ∆ BCA that correspond to
- ∠E
- \(\overline { EF } \)
- ∠F
- \(\overline { DF } \)
Solution:
- ∠C
- \(\overline { CA } \)
- ∠A
- \(\overline { BA } \)
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