EXERCISE 7.1
"Congruence of Triangles" Chapter 7 - Introduction - NCERT Class 7th Maths Solutions
Congruence of Triangles Introduction - NCERT Class 7th Maths Solutions
Q 1, Ex 7.1 - Congruence of Triangles - Chapter 7 - Maths Class 7th - NCERT
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 _______________.
Sol :
(a) they have the same length
(b) 70∘
(c) m∠A = m∠B
Q 2, Ex 7.1 - Congruence of Triangles - Chapter 7 - Maths Class 7th - NCERT
Give any two real time examples for congruent shapes
Sol :
(i) Two footballs
(ii) Two teacher’s tables
Q 3, Ex 7.1 - Congruence of Triangles - Chapter 7 - Maths Class 7th - NCERT
QUESTION 3
If ΔABC≅ΔFED under the correspondence ABC ↔ FED , write all the corresponding congruent parts of the triangles.
Sol :
Given: ΔABC≅ΔFED
The corresponding congruent parts of the triangles are:
(i) ∠A ↔ ∠F
(ii) ∠B ↔ ∠E
(iii) ∠C ↔ ∠D
(iv) $\overline{\text{AB}}↔\overline{\text{FE}}$
(v) $\overline{\text{BC}}↔\overline{\text{ED}}$
(vi) $\overline{\text{AC}}↔\overline{\text{FD}}$
Q 4, Ex 7.1 - Congruence of Triangles - Chapter 7 - Maths Class 7th - NCERT
QUESTION 4
If ΔDEF≅ΔBCA, write the part(s) of ΔBCA that correspond to:
(i) ∠E (ii) $\overline{\text{EF}}$ (iii) ∠F (iv) $\overline{\text{DF}}$
Sol :
Given : ΔDEF≅ΔBCA
(i) ∠E ↔∠C
(ii) $\overline{\text{EF}}↔\overline{\text{CA}}$
(iii) ∠F ↔∠A
(iv) $\overline{\text{DF}}↔\overline{\text{BA}}$
0 comments:
Post a Comment