Daily Lesson Plan (lesson 5.6)
Date: 11/12/2003 Course: Informal Geometry Period: 6th
to recognize and use overlapping congruent and similar triangles
to write the correspondence between congruent triangles correctly
(AKS) to use transformational geometry to show congruency and
similarity (QCC 2003 – 20)
(AKS) to classify triangles and polygons (QCC 2003 – 24)
(AKS) to apply properties of logic (QCC 2003 – 27)
(to involve all students, purpose could be to find readiness for objective)
Have students explore overlapping congruent triangles by constructing
the “star logo” pattern on page 282.
Students are given cut outs of a pentagon, and three different triangles and are
told to trace these cut outs to produce the “star logo” in three different ways by
using the triangles one at a time with the pentagon.
(cues, reinforcement, practice, feedback, involvement)
Students will practice noticing overlapping congruent triangles in
various figures with guidance and discussion
Students will practice how to write that triangles are congruent.
The fact that order matters in writing the correspondence of congruent triangles
will be stressed.
We will work through a real-life application of noticing overlapping
congruent triangles using the real estate examples numbered 18 and
19 on page 284.
(to involve all students and to identify student’s success with daily objectives)
Students will be given an end-of-section worksheet dealing with
recognizing overlapping congruent triangles in various figures and
correctly writing the correspondence.
Students will finish the worksheet mentioned above for homework to
further investigate the topic
Activity for the Last Five Minutes/Purpose
Summarize the topic by stressing the importance of writing congruent
triangles in the proper order. ORDER MATTERS
Give insight into tomorrow’s lesson covering Section 5.7 involving the
Angle-Angle-Side Congruence Theorem (AAS).