Class 6 - Mathematics
Chapter - Congruence of Triangles : Exercise 7.1
Top Block 1
Question: 1.Complete the following statements:
Two line segments are congruent if _______________.
Among two congruent angles, one has a measure of 70o, the measure of other angle is _______________.
When we write ∠A = ∠B, we actually mean _______________.
Answer :
(a) they have the same length
(b) 70o
(c) m ∠A = m ∠B
(b) 70o
(c) m ∠A = m ∠B
Question: 3.If ΔABC ≅ ΔFED under the correspondence ABC ↔ FED, write all the corresponding congruent parts of the triangles.
Answer :
Mddle block 1
Given: ΔABC ≅ ΔFED.
The corresponding congruent parts of the triangles are:
(i) ∠A ↔ ∠F
(ii) ∠B ↔ ∠E
(iii) ∠C ↔ ∠D
(iv) AB ↔ FE
(v) BC ↔ ED
(vi) AC ↔ FD
The corresponding congruent parts of the triangles are:
(i) ∠A ↔ ∠F
(ii) ∠B ↔ ∠E
(iii) ∠C ↔ ∠D
(iv) AB ↔ FE
(v) BC ↔ ED
(vi) AC ↔ FD
Question: 4.If ΔDEF ≅ ΔBCA, write the part(s) of ΔBCA that correspond to:
i. ∠E
ii. EF
iii. ∠F
iv. DF
Answer :
Given: ΔDEF ≅ ΔBCA.
(i) ∠E ↔ ∠C
(ii) EF ↔ CA
(iii) ∠F ↔ ∠A
(iv) DF ↔ BA