Question

:. In a AABC, AB = AC and D is a point on
AB, such that AD = DC = BC. Then,
ZBAC is equal to
[SSC FCI 2012]
(a) 40°
2
(b) 45°
(C) 30°
(d) 36°​

Answer 1

Answer:

$</p><p>In △ABD,</p><p></p><p>∠ADB+∠A+∠ABD=180o</p><p></p><p>⇒∠ADB+36+36=180o</p><p></p><p>⇒∠ADB=180−72=108o</p><p></p><p>$

In an isosceles triangle , opposite to equal sides are equal. In a triangle, one side is extended,

the exterior angle is equal to sum of interior opposite angles

Answer 2

Answer:

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