S.chand publication New Learning Composite mathematics solution of class 7 Chapter 11 Congruence of Triangles Exercise 11A

 Exercise 11A

Question 1

Pair each given figure with a congruent figure from the collection at the right

(a)↔️(f)

(b)↔️(j)

(c)↔️(b)

(d)↔️(e)

(e)↔️(g)

(f)↔️(c)

(g)↔️(d)

(h)↔️(h)

Question 2

Study the given figures carefully and state which of them are congruent (If necessary , measure the corresponding sides to make sure)

(a)↔️(n)

(b)↔️(h)

Question 3

The pair of triangle drawn below are congruent triangles. Name the congruent triangles, write the matching angles in the same order(not necessarily alphabetically order) and complete

(a) ΔABC≅ΔDEF

Corresponding sides : AB=DE

BC=EF

CA=FD

Corresponding angles : ∠A=∠D

∠B=∠E

∠C=∠F

(b) ΔABC≅ΔPQR

AB=PQ  ∠A=∠P

BC=QR  ∠B=∠Q

CA=RP  ∠C=∠R

(c) ΔABC≅ΔDEF

AB=EF  ∠A=∠F

BC=ED  ∠B=∠E

CA=FD  ∠C=∠D

(d) ΔABC≅ΔRPQ

AB=RP  ∠A=∠R

BC=PQ  ∠B=∠P

CA=QR  ∠C=∠Q

(e) ΔLMN≅ΔXYZ

LM=YZ  ∠L=∠Y

MN=ZX  ∠M=∠Z

NL=XY  ∠N=∠X