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

Download PDF of This Page (Size: 354K)

Understanding of triangle Congruence

Understanding of Triangle Congruence

Understanding of triangle Congruence

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

Triangle ABC and DEF, it is correspondence ABC↔FED

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

Triangle ABC and DEF, it is correspondence ABC↔FED

(i)

(ii)

(iii)

(iv)