Question

Class 9 Ch-7 Congurency...please solve...
Find the congruency criteria...
whether it is ASA, SSS or SAS.​

Answer 1

Answer:

ASA

Angle side angle

Step-by-step explanation:

If u take the triangle ABD and ACD angle A between them is common and angle D is common. The sides AB and AC are common . So the answer is ASA .

Answer 2

Step-by-step explanation:

Given,

• A Δ ABC in which AD is the median and AB=AC, angle ABD= angleACD
• Since AD is a median therfore BD=DC

To prove:- ΔABD congruent to ΔACD

Proof:-

=>In Δ ABD and ΔACD, we have

=>AB=AC ( given)

=>AngleB=AngleC (given)

=>BD=DC (given)

=> therefore ΔABD congruent to ΔACD by S.A.S criteria

hope it helps.. :-)