Question

Given that ACBD is a kite.

Assertion: The triangles ACB and ADB are congruent.
Reason: SSS congruence rule is used to prove that these triangles are congruent.

Answer 1

In the $△ABC$ and $△ABD$,
AC = AD (Given)
CB = DB (Given)
AB is the common side.
$⟹△ABC\cong △ABD$ [SSS congruency]
Thus, by SSS congruency rule, the two triangles (ABC and ABD) are congruent.
Therefore, both assertion (A) and reason (R) are true, and reason (R) is the correct explanation of assertion (A).