This is an important and exam oriented question from Chapter name- circles
Topic – Angle properties of circles
Chapter number- 15
In this question we have been given the future of the circle and we have to find the value of x in the figure
ICSE Avichal publication
Understanding ICSE Mathematics
Question 1
In
∆ABC
∠ABC + ∠ABC + ∠BAC = 180o
(Because sum of a triangle)
69o + 31o + ∠BAC = 180o
∠BAC = 180o – 100o
∠BAC = 80o
Since ∠BAC and ∠BAD are in the same
Segment.
∠BAD = xo = 80o