Question

b) For the paper plane in Fig. 4. prove that the two wings are congruent.
M
15 cm
Х
А
9 cm
15 cm
9 cm
NO
B
Z o
20 cm
E
Fig. 3
Fig. 4​

Answer 1

Given : paper plane in Fig. 4 ( attached)

To Find : prove that the two wings are congruent. ​

Solution:

Two winds are

ACB  and  ADE

ACB and ADE are in triangular shape

ΔACB  & ΔADE

AC = DE   Given

∠ACB = ∠ADE   = 90°   ( given )

CB = DE    Given

=> ΔACB ≅  ΔADE   ( SAS)

Hence Two wings are congruent

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