- Identify the exterior angles of convex polygons.
- Find the sums of exterior angles in convex polygons.
II.Cross-curricular-Mandalas
- Use the information that you developed in the last lesson to work on this project.
- Use the image of the mandala on this website.
- This is Figure 06.02.01
- http://www.isibrno.cz/ gott/mandala/sriclr2.gif
- Now tell students that today they are going to be working to design their own mandalas.
- The students need to include triangles and quadrilaterals in their design.
- Then they also need to identify the interior and exterior angles of the quadrilaterals.
- Be sure to tell students to use color and creativity in their designs.
- Then have the students write a paragraph describing the mandala and explaining the connections between the
interior angles and the exterior angles and the measurements of 180◦and 360◦. - Allow time for students to share their work when finished.
- Display the mandalas in the classroom.
III.TechnologyIntegration
- Students can go to the following website and investigate the interior and exterior angles of quadrilaterals.
- This site is fun, interactive and colorful.
- http://www.slideshare.net/guest4210b1/quadrilaterals
- Students can participate in this as an independent study activity.
IV.NotesonAssessment
- Assess student mandalas.
- Did the students incorporate the triangles and quadrilaterals?
- Are the interior angles labeled or identified in some way?
- Are the exterior angles labeled or identified in some way?
- Is the writing piece clearly written?
- Does it explain the angle measures?
- Provide students with feedback on their work.
Classifying Quadrilaterals
I.SectionObjectives
- Identify and classify a parallelogram.
- Identify and classify a rhombus.
- Identify and classify a rectangle.
- Identify and classify a square.
- Identify and classify a kite.
- Identify and classify a trapezoid.
- Identify and classify an isosceles trapezoid.
- Collect the classifications in a Venn diagram.
- Identify how to classify shapes on a coordinate grid.
II.Cross-curricular-Art
3.6. Quadrilaterals