Mid-Segment Maylay

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SWBAT identify relationships between the mid-segment of a triangle and the sides of that triangle.

Big Idea

Students will construct mid-segments in triangles and discover key properties of mid-segments within triangles.

Do Now

10 minutes

In this Do Now, students will review how to calcuate the midpoint of a line segment given its two endpoints.  This will access students' prior knowledge of midpoint, a skill needed to complete this lesson in mid-segments. 

Explorations 1 and 2

45 minutes

Interleaving Practice with Midsegments

15 minutes

Activity/Homework and Exit Ticket

15 minutes

The Activity reviews how to prove that the mid-segment in a triangle is parallel to the  base of the triangle using coordinate geometry and slope.  There is also a link to online practice questions which review applied questions with mid-segments.  Students can complete the activity in class or has a homework assignment depending on how much time is left in class. 

The Exit Ticket requires students to determine the length of a side of a triangle given the length of a mid-segment.  This could be used as a quick formative assessment for students' knowledge of this topic.