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1) The topic and target student age group is: Polygons in Geometry – 10th/11th Grade

2) The state standard(s) this lesson will address are:
Geometry Standard 2 – G.2.1, G.2.4, G.2.5
Geometry Standard 3 – G.3.3, G.3.4
Geometry Standard 8 – G.8.7

3) My learning objectives are:
-Identify and describe convex, concave, and regular polygons.
-Classify polygons based on the number of sides it has and compare/contrast these with each other.
-Apply rotations on polygons and observe the preservation of congruence.
- Find areas of polygons.
- Use coordinate geometry to prove congruence of polygons.
- Construct logical arguments to show your interpretation of rotated triangles are congruent.

4) For each of your 5 websites create a question for assessment and the answer. Plan your assessment in the form below.

Track Star Lesson Planner

I. Math is Fun - Polygons
A. http://www.mathsisfun.com/geometry/polygons.html
B. Annotation
1. Task: Review polygons and their characteristics.
2. Purpose: Re-introduce the definition of polygons to the students.
3. Assessment: Please state the definition of a ‘Polygon’.
4. Answer: A polygon is a plane shape with straight sides.

II. Figures and Polygons
A. http://www.mathleague.com/help/geometry/polygons.htm#regularpolygon
B. Annotation
1. Task: Review regular polygons and their characteristics.
2. Purpose: Re-familiarize students with the definition of a regular polygon.
3. Assessment: What is the definition of a ‘Regular Polygon’?
4. Answer: A regular polygon is a polygon whose sides are all the same length, and
whose angles are all the same.

III. Figures and Polygons
A. http://www.mathleague.com/help/geometry/polygons.htm#regularpolygon
B. Annotation
1. Task: Review convex and concave polygons. Note their similarities and differences.
2. Purpose: Re-introduce the definition of a convex polygon to the students.
3. Assessment: Please state the definition if a ‘Convex Polygon’.
4. Answer: A polygon whose every line segment drawn between any two points inside
the figure, lies entirely inside the figure.

IV. A picture of a polygon.
A. http://www.ams.org/featurecolumn/images/diagonals24.gif
B. Annotation
1. Task: Compare the differences between concave and convex polygons.
2. Purpose: Allow students to demonstrate whether or not the know the differences
between concave and convex polygons.
3. Assessment: Is the polygon on this page best described as convex?
4. Answer: No, there is a section of the polygon that caves in such that we can draw a
line segment between two points inside the figure that lies partly outside the figure.

V. AAA Math - Polygons
A. http://www.aaastudy.com/geo318x4.htm
B. Annotation
1. Task: Learn the names of the different polygons based on the number of sides it
contains.
2. Purpose: Become familiar with naming of polygons based on its number of sides.
3. Assessment: Determine name of a polygon with 9 sides.
4. Answer: Nonagon

VI. Math is Fun – Regular 2_-D Shapes Polygons
A. http://www.mathsisfun.com/shape.html
B. Annotation
1. Task: Look at the pictures for the different polygons and try to relate the number
sides to the name of the polygons.
2. Purpose: Help students to logically remember some of the names of polygons so it is
more likely to go into long term memory.
3. Assessment: Between a ‘Nonagon’ and a ‘Dodecagon’, the nonagon has the larger
number of sides?
4. Answer: False


VII. AAA Math – Area of a parallelogram
A. http://www.aaamath.com/geo78_x2.htm
B. Annotation
1. Task: Familiarize yourself with the area of a parallelogram.
2. Purpose: Demonstrate ability to find area of parallelogram.
3. Assessment: Calculate area of parallelogram with given a base of 10 inches and a
height of 6 inches.
4. Answer: 60 sq. inches

VIII. Math is Fun - Congruent
A. http://www.mathsisfun.com/geometry/congruent.html
B. Annotation
1. Task: Go down to the section that says ‘Congruent or Similar?’ Notice the
characteristics of both.
2. Purpose: Students can compare and contrast congruence and similarity.
3. Assessment: Based on what you read on this page answer the following question.
What do you think the difference between congruence and similarity are?
4. Answer: Congruence means same size and shape, whereas similar means same
shape only.

IX. Math is Fun - Rotation
A. http://www.mathsisfun.com/geometry/rotation.html
B. Annotation
1. Task: Go to the blue box with the coordinate plane in it. Click on the triangle. Now
Change the ‘Angle’ to be 90 degrees. Then click ‘Rotate!’
2. Purpose: Students can see how shapes are rotated but still maintain their shape and
size. They stay congruent.
3. Assessment: A.What are the new coordinates of the triangle’s vertices?
B. Is the new triangle congruent the original one? Why or why not?
4. Answer: A. (6,0), (-3,-2), & (2,-1)
B. Yes. The triangle did not change in any was except for being rotated
about the origin. The side lengths and angles all stayed the same.