Congruence of Triangles - Solutions

 CBSE Class –VII Mathematics

NCERT Solutions
Chapter 7 Congruence of Triangles
 (Ex. 7.1)

Question 1. Complete the following statements:

  1. Two line segments are congruent if _______________.
  2. Among two congruent angles, one has a measure of 70, the measure of other angle is _______________.
  3. When we write A = B, we actually mean _______________.

Answer: (a) they have the same length

(b) 70

(c) mA = mB

Question 2. Give any two real time examples for congruent shapes.

Answer: (i) Two footballs

(ii) Two teacher’s tables

Question 3. If ΔABC ΔFED under the correspondence ABC  FED, write all the corresponding congruent parts of the triangles.

Answer: Given: ΔABC ΔFED.

The corresponding congruent parts of the triangles are:

(i) F

(ii) E

(iii) D

(iv) AB¯FE¯

(v) BC¯ED¯

(vi) AC¯FD¯

Question 4. If ΔDEF ΔBCA, write the part(s) of ΔBCA that correspond to:





Answer: Given: ΔDEF ΔBCA.

(i) C

(ii) EF¯CA¯

(iii) A

(iv) DF¯