Circle by Center Point

An ellipse constructed by its focuses and a point that pertains to it

A circle constructed by its center and a point that pertains to it

Polka dots.

The inversion of a point, line or circle with respect to a circle

Circle Click this to start drawing a circle.

Draw Sticks

Draw spots

Disc Bullet

One triangle... one half circle... and one little dot... there.

Every dot is a person. We make the dot size proportional to people's body size so bigger dots are bigger people.

Ellipse by Focuses Point

Osculating circle at this point

Circle by Three Points

Circles around the Origin.

Kinda round? Yes...

Inversion of Point, Line or Circle

Select a point on the circle...

And then the next thing we do is we put a dot in the center of the circle.

A circle constructed through three points

Project this point onto the circle

Oops. Polka dots. Your favorite.

Construct an ellipse with this focus

Osculating circle of a curve at a point

Arc by Center, Angle Point

Select a point for the new circle to go through...

He's a bit uh...round the edges.

Have you got a polkadot dress?

Oh. Look, Sarge, polka dots.

Start transport from this point of the circle

Construct a circle through this point

Select the first focus of the new ellipse...

Select the second focus of the new ellipse...

Construct an ellipse through this point

It would be the circle with the dot.

So, again, every dot is a person.

And now I'm highlighting a few dots.

Conic Arc by Center and Three Points

Select a point for the new ellipse to go through...

Their machines appear as round blobs.

A normal point, i. e. one that is either independent or attached to a line, circle, segment.

So, we have two panels here, of colored dots.

There are thousands of these blue dots all over the county.

The orbit of the satellite will be elliptical with a perigee height of km and apogee height of 1400 km.

Construct an arc by its center and a given angle, starting at a given point