One of the most important and exam oriented question from Chapter name- circles
Topic – Angle properties of circles
Chapter number- 15
This question has been asked in 1994.
In this question we have been given that , O is the centre of the circumcircle of triangle XYZ.
Two tangents at X and Y intersect at T.
Also it is given ∠XTY = 80° and ∠XOZ = 140°, now we have to calculate the value of ∠ZXY.
ICSE Avichal publication
Understanding ICSE Mathematics