Maths Puzzle

2. The measure of uncertainty is called
4. The common point of a tangent and circle
5. The distance of a point from y- axis is called
8. Two or more circles having same centre
10. Part of the circular region enclosed between two radii and corresponding arc
11. A tangent to a circle intersects it in point
12. The line drawn from the eye of an observer to the point in the object viewed by the observer

1. The distance of a point from x– axis is called its
3. vertical cross section of a right circular cylinder is always
6. The mathematical instrument which is used for measuring the angle of elevation depression of an object
7. The probability of impossible event is
9. A quadratic equationb2 - 4ac = 0