Problems from A line in the plane: positions regarding a circumference

Development:

Note: to resolve this exercise, it is very fortuitous to take paper and pencil and draw a picture of each case to see the solution clearly.

1. the distance from the center to the line is less than the radius, so it is a secant line.

2. the distance from the center to the line is less than the radius, so it is a secant line.

3. the distance from the center to the line is less than the radius, so it is a secant line.

4. the distance from the center to the line is equal to the radius, so it is a tangent.

5. the distance from the center to the line is greater than the radio, so it is an external line.

Solution:

1. secant
2. secant
3. secant
4. tangent
5. external

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