Question

Plz answer my question​

Answer 1

Step-by-step explanation:

Synthetic fibres have so popular because of their much superior properties as compared to natural fibres like cotton, silk and wool. ... So, the clothes made of synthetic fibres dry quickly after washing. (ii) Synthetic fibres are very strong

Answer 2

Answer:

Triangles ABC and DBC have side BC common, AB=BD and AC=CD.

So,

BC=BC⋯⋯[common side]

AB=BD⋯⋯[given]

AC=CD⋯⋯[given]

So, by SSS test we can say that,

ΔABC≅ΔDBC

Congruence condition used is SSS

Suppose congruent triangles are as shown as in the figure.

Then, ∠ABD



=∠ACD

Then they will not be equal.

Because , ∠ABD=∠ABC±∠DBC

and ∠ACD=∠ACB±∠DCB

From congruency, ∠ABC≅∠DBC and ∠ACB≅∠DCB

So, we cannot say that ∠ABD is equal to ∠ACD