Question

tell the answer fast and in full method​

Answer 1

Answer:

A triangle named ABC make a line as a bisector named AD and it should be perpendicular to BC

Answer 2

Answer:

AD bisects ∠A and is perpendicular to BC.

To prove : ΔABC is isoceles

Proof :

In ΔABD & ΔADC

∠BAD=∠DAC (∵ D bisects ∠A)

∠ADB=∠ADC

⇒∠ABD=∠ACD

(∵ if two angles in a triangle are equal to two angles in another triangle then the third angle of both the triangles must also be equal)

⇒∠B=∠C

∴ AB=AC (if two angles are equal then the side opposite to the angles will also be equal)

Proved .

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