3. In Fig 7.24, measures of
NCRTC class-7 ch-7 Congruence of Triangles.
Page no: 144 [Q3 iii]
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3.some parts of the triangles are indicated. By applying SAS
congruence rule, state the pairs of congruent triangles, if any, in each case. In case
of congruent triangles, write them in symbolic form
[Picture is given iii]
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Answers
Step-by-step explanation:
Page No 137:
Question 1:
Complete the following statements:
(a) Two line segments are congruent if __________.
(b) Among two congruent angles, one has a measure of 70°; the measure of the other angle is __________.
(c) When we write ∠A = ∠ B, we actually mean __________.
ANSWER:
(a) They have the same length
(b) 70°
(c) m ∠A = m ∠B
Page No 137:
Question 2:
Give any two real-life examples for congruent shapes.
ANSWER:
(i) Sheets of same letter pad
(ii) Biscuits in the same packet
Page No 137:
Question 3:
If ΔABC ≅ ΔFED under the correspondence ABC ↔ FED, write all the Corresponding congruent parts of the triangles.
ANSWER:
If these triangles are congruent, then the corresponding angles and sides will be equal to each other.
∠A ↔ ∠F
∠B ↔ ∠E
∠C ↔ ∠D
Page No 137:
Question 4:
If ΔDEF ≅ ΔBCA, write the part(s) of ΔBCA that correspond to
(i) ∠E (ii) (iii) ∠F (iv)
ANSWER:
(i) ∠C
(ii)
(iii) ∠A
(iv)
Video Solution for congruence of triangles (Page: 137 , Q.No.: 4)
NCERT Solution for Class 7 math - congruence of triangles 137 , Question 4
Page No 149:
Question 1:
Which congruence criterion do you use in the following?
(a) Given: AC = DF
AB = DE
BC = EF
So, ΔABC ≅ ΔDEF
(b) Given: ZX = RP
RQ = ZY
∠PRQ = ∠XZY
So, ΔPQR ≅ ΔXYZ
(c) Given: ∠MLN = ∠FGH
∠NML = ∠GFH
ML = FG
So, ΔLMN ≅ ΔGFH
(d) Given: EB = DB
AE = BC
∠A = ∠C = 90°
So, ΔABE ≅ ΔCDB
ANSWER:
(a) SSS, as the sides of ΔABC are equal to the sides of ΔDEF.
(b) SAS, as two sides and the angle included between these sides of ΔPQR are equal to two sides and the angle included between these sides of ΔXYZ.
(c) ASA, as two angles and the side included between these angles of ΔLMN are equal to two angles and the side included between these angles of ΔGFH.
(d) RHS, as in the given two right-angled triangles, one side and the hypotenuse are respectively equal.
it is very simple answer is sas rule thankyou very much