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

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

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.

45 minutes

15 minutes

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.

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