Question
$\triangle\text{ABC}$ is isosceles with $AB = AC. AD$ is the altitude from $A$ on $BC$.
Is $\triangle\text{ABD}\cong\triangle\text{ACD}?$
Is $\triangle\text{ABD}\cong\triangle\text{ACD}?$
✓
Answer
Yes, $\triangle\text{ABD}\cong\triangle\text{CBD}$ by $RHS$ congruence condition.
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