NCERT Solution class 7 Mathematics EXERCISE- 7.1
CHAPTER – 7
EXERCISE – 7.1
Q1. Complete the following statements:
(a) Two lines segments are congruent if _They have the same length_________.
(b) Among two congruent angles, one has a measure of 700; the measures of the other angle is __700________.
(c) When we write Angle A = Angle B , we actually mean__m Angle A = m Angle B________
Q2. Give any two real – life examples for congruent shapes.
The two real – life examples for congruent shapes are,
(i) Fan feathers of same brand.
(ii) Size of chocolates in the same brand.
Two triangles are congruent If pairs of corresponding sides and corresponding angles are equal.
All the corresponding congruent parts of the triangles are,
Angle A <-> Angle F , Angle B <-> Angle E , Angle C , <-> Angle D
Correspondence between sides;
AB <-> FE
BC <-> ED
CA <-> DF
Q4. If ΔDEF ≈ΔBCA, write the part(s) of ΔBCA that correspond to
(i) Angle E
(iii) Angle F
From above the figure we can say that,
The part(s) of ΔBCA that correspond to,
(i) Angle E <-> Angle C
(ii) EF <-> CA
(iii) Angle F <-> Angle A
(iv) DF <-> BA