Circle Geometry

3. The set of points which is at equal distance from a fixed point.
6. Incircle can be drawn from the point of intersection of _________.
9. Angle substended from the center of the circle is ____ the angle subtended from its circumference.
10. A circle that encloses a shape inside it and passes from each vertex.
11. A line which just touches the circle at one point on the circumference.
12. Its formula is 2*Pi*r

1. It is perpendicular to tangent.
2. Its formula is Pi*r*r
4. A circle which gets enclosed in a shape and touches every side of the shape.
5. A straight line connecting two points on the circumference without passing through diameter.
7. Circum circle is drawn from the intersection of the points of _____________.
8. A circle in three dimension.