(edited, original ppt by T.Carl)

2. SECONDARY PARTSOF A TRIANGLE E-Math pp.132-136

3. Can YOU do this? Figure 1 Draw a circle. Then draw a triangle inside it whose vertices are on the circle. Figure 2 Draw a circle. Then draw a triangle outside it, making sure the circle is touching the triangle.

4. How about THIS? Figure 3 Draw the figure in the right, this time drawing the triangle first. Figure 4 Draw the figure in the right, this time drawing the triangle first.

5. Secondary Parts of a Triangle: Angle Bisectors Perpendicular Bisectors Medians Altitudes

6. Angle Bisector a segment that bisects an angle of the triangle; endpoints are a vertex and a point on opposite side

7. Perpendicular Bisector a line that passes through the midpoint of a side of the triangle, and is perpendicular to it

8. Median a segment connecting a vertex of a triangle and the midpoint of the opposite side

9. Altitude a segment from the vertex of the triangle perpendicular to the line containing the opposite side

10. Points of Concurrency Angle Bisectors INCENTER Perpendicular Bisectors  CIRCUMCENTER Medians  CENTROID Altitudes  ORTHOCENTER