Tangency Tip 05

How to draw an arc in touch externally and touch through a given point

1. Draw a perpendicular line PR,
2. Draw a parallel line OA,
3. Draw line AP intersecting at K,
4. Draw line OK intersecting at S,
5. Centered at S, draw arc through P and K.

Tangency Tip 04

How to draw an arc in touch internally and through a given point

1. Draw line PR and bisect it.
2. Draw straight line RO to intersect at S.
3. Centered at S, draw an arc through P and R.