What are some special parts of triangles, and how do we label them?

Do Now:

1. Write HW in agenda.

2. Put your HW out on your desk.

3. Complete today’s Do Now sheet.

Take out: pencil, do now sheet, homework (will be collected)

Tonight’s Homework: Median and Midsegment HW worksheet

9th Grade Geometry Monday -10/18/10Objectives:Draw, label, and define the median and/or midsegment of a triangle.

Solve problem using the definition of a midsegment, median, perpendicular bisector.

Agenda:1. Do Now – Pre-

Assessment (10 min)

2. New Vocab Powerpoint (15 min)

3. Perpendicular Bisector Investigation (15 min)

4. Practice Problems to be finished for HW (10 min)

Triangle Vocabulary

Median

In the description box write a description of median by looking at the picture in your own words.

Now draw a picture of one in the picture box

Midsegment

In the description box write a description of midsegment by looking at the picture in your own words.

Now draw a picture of one in the picture box

Midsegment Continued

A midsegment ofa triangle is a segment that connects the midpoints of two sides of a triangle

A midsegment connecting two sides of a triangle is parallelto the third side and is half as long.

Altitude

Description: A line segment that goes from a vertex to the base of a triangle and creates a 90 degree angle

In the description box write a description of median by reading the definition and putting it in your own words.

Now draw a picture of one in the picture box

Perpendicular Bisector

In the description box write a description of perpendicular bisector by looking at the picture.

Now draw a picture of one in the picture box

Perpendicular Bisector Investigation Expectations

Take out: pencil1 piece of patty paperRuler

Expectations:1) First pick a reader for your group. This person will:

1) Read all instructions BEFORE anyone starts2) Make sure everyone is on the same step at the same time3) No off topic conversations4) If you have a question, I will only come to your group when

ALL members of the group are raising their hands.5) When you are finished, everyone should raise their hand

and I will bring you the HW.

9th Grade Geometry Monday -10/18/10Objectives:•Draw, label, and define the median and/or midsegment of a triangle.

•Solve problem using the definition of a midsegment, median, perpendicular bisector.