Q. 3 A4.4( 20 Votes )

In each of the fo

Δ ABC is isosceles with AB = AC

BAC = 400(Given)

In an isosceles triangle since the base angles are equal so

ABC = ACB = y (Let’s assume)

ABC + ACB + BAC = 1800(Sum of interior angles of a triangle)

2y = 1800-400 = 1400

y = 700

ACB = 700

ACB + x = 1800(Angle on a straight line)

x = 1800 - 700 = 1100

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