NCERT Class 7 Mathematics Solutions: Chapter 7 –Congruence of Triangles Exercise 7.1 Part 1

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Understanding of triangle Congruence

Understanding of Triangle Congruence

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1. Complete the following statements:

(a) Two line segments are congruent if_____________.

(b) Among two congruent angles, one has a measure of , the measure of other angle is___________.

(c) When we write , we actually mean_____________.

Answer:

(a) Two line segments are congruent if they have the same length.

(b) Among two congruent angles, one has a measure of , the measure of other angle is

(c) When we write , we actually mean .

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

Answer:

(i) Two footballs

(ii) Two teacher’s tables.

3. If under the correspondence, write all the corresponding congruent parts of the triangles.

Answer:

Triangle ABC and DEF

Given,

The corresponding congruent parts of the triangles are:

(i)

(ii)

(iii)

(iv)

(v)

(vi)

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

(i)

(ii)

(iii)

(iv)

Answer:

Triangle DEF and BCA

(i)

(ii)

(iii)

(iv)