Construct a Circumcircle (circumcenter.....perpendicular bisectors

Why do they only do two?? The definition/theorem says intersection of 3????

Construct an Incircle (incenter....angle bisectors)

That last step is to help draw the circle.

It touches at a location perpendicular from the point to the side.

BTW

Median (needs midpoint)

Altitude (needs a perpendicular) think of that top point as a vertex

(onlinemathlearning video.... another video )

3 altitudes intersect (concurrency) and make an orthocenter (& therefor orthocircle)

Midsegment (needs 2 midpointx)

Do you know the definitions of these?

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