### MonoGRAF Entities. Circles

**Circle**

You can draw a circle in one of the following eight ways using the following functions
of the "circle" submenu:

- Center & point - draws a 2-point circle (center and any point on the circle) in "rubber band circle" mode;
- Center & radius - draws a circle by the center point and specified radius;
- 2 pts on diameter - draws a circle by the two endpoints on any of its diameters;
- 3 point circle - draws a circle, specified by any 3 points on it;
- Tangent to line - draws a circle tangent to a selected line;
- Tangent to two lines - draws a circle tangent to two selected lines;
- Tangent to circle - draws a circle tangent to a selected circle;
- Tangent to line & circle - draws a circle tangent to a selected line and to a selected circle;

**Circle by a center and a point**

The "center & point" function draws a 2-point circle (center and any point on the circle) in "rubber band circle" mode.

PROMPTS:

- Circle center?
- Point on circle?

"Identical points"

PARAMETERS available via the "params" function of the control menu:

"linetype, color, level of detail".

**Circle by a center and a radius**

The "center & radius" function draws a circle by the center point and specified radius.

PROMPTS:

- Circle center?
- Circle radius?

"Identical points"

PARAMETERS available via the "params" function of the control menu:

"linetype, color, level of detail"

**Circle by two points on the diameter**

The "2pts on diameter" function draws a circle by the two end points on any of its diameters.

PROMPTS:

- First circle point?
- Second circle point?

"Identical points"

PARAMETERS available via the "params" function of the control menu:

"linetype, color, level of detail"

**Circle by three points**

The "3 point circle" function draws a circle, specified by any 3 points on it.

PROMPTS:

- First circle point?
- Second circle point?
- Third circle point?

"The three points are co-linear"

PARAMETERS available via the "params" function of the control menu:

"linetype, color, level of detail"

**Circle tangent to a line**

The "tangent to line" function draws a circle tangent to a selected line. You must specify the circle radius, two points on the direction on which the center of the circle lies and the point indicating the side of the circle respecting the line.

PROMPTS:

- Select object
- Circle/arc radius?
- First point of the direction?
- Second point of the direction?
- At which side?

"linetype, color, level of detail"

**Circle tangent to two lines**

The "tangent to two lines" function draws a circle tangent to two selected lines. You must specify the circle radius.

PROMPTS:

- Select object
- Select object
- Circle/arc radius?

"linetype, color, level of detail"

**Circle tangent to a circle**

The "tangent to circle" function draws a circle tangent to a selected circle. You must specify the circle radius, two points on the direction on which the center of the circle lies and the point indicating the side of the circle respecting the line.

PROMPTS:

- Select object
- Circle/arc radius?
- First point of the direction?
- Second point of the direction?
- At which side?

"linetype, color, level of detail"

**Circle tangent to a line and a circle**

The "tangent to line & circle" function draws a circle tangent to a selected line and to a selected circle. You must specify the circle radius.

PROMPTS:

- Select object
- Select object
- Circle/arc radius?

"linetype, color, level of detail"

Learning more for MonoGRAF basics