The distance between two parallel tangents of a circle of radius 4 cm is______.

In fig. 2, PA and PB are tangents to the circle with centre O such that ∠APB = 50°, then the measure of ∠OAB is______.

OR

In Q. Fig. 3, PQ is a chord of a circle and PT is tangent at P such ∠QPT = 60°, then the measure of ∠PRQ is____.

The distance of the point (–3, 4) from Y-axis is_____.

Value of