Question

In ∆ABC, if AB = AC and BC is produced to D such that angle ACD =
100°, then
angle BAC =


​

Answer 1

Answer:

20 degrees

Step-by-step explanation:

Angle ACD = 100,

Therefore interior angle ACB = 180-100(linear pair) = 80 degrees

And given, AB = AC, so its a isoceles triangle and we know that ISOCELES Triangle has base angles equal therefore, angle ABC  = 80 degrees.

thus, Angle BAC = 180-80-80(Angle sum property of a triangle) = 20 degrees.

Hoe you find it helpful, mark as brainliest.