| Part 4: Students Presenting Solutions [Begin:
19:20]
|
For about ten minutes, the students discuss the problem with each other, the teacher,
or the assistant teacher. The teacher asks two students to draw their solution methods
on the chalkboard while the other students finish their discussions. The teacher
then asks everyone to return to their seats and attend to the students’ presentations.
While a series of students explain their solutions, the rest of the students and
the teacher ask questions and request clarifications. The solutions involve drawing
parallel line segments, one connecting the two endpoints of the boundary and the
other passing through the point of the bend in the boundary. By moving the vertex
along the line segment, a new straight boundary can now be formed that retains the
same areas. |
