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GEOMETRY
CIRCLING THE BASES
HOUSTON ASTROS IN PARTNER WITH THE NBHOF
LESSON 2:
PRE-VISIT - A DIAMOND FILLED WITH SHAPES
OBJECTIVE: Students will be able to:
Define the term polygon.
Recognize different polygons evident in baseball.
Draw and identify different polygons.
TIME REQUIRED: 1 class period
MATERIALS NEEDED:
Students’ Geometry Dictionaries started in Lesson 1
Baseball Polygons cards (Included) printed and cut out
Copies of the “Defining Polygons” worksheet (Included) - 1 for each student
Glue sticks
Markers or crayons
Index cards (4 for each student)
7 sheets of poster board
Label each with the name of a different polygon (square, rectangle, triangle,
quadrilateral, pentagon, hexagon, and octagon) and hang them up around the room
VOCABULARY:
Angle - The figure formed by two lines extending from the same point
Congruent - Having the same size and shape
Geometry - A branch of mathematics that deals with points, lines, angles, and shapes
Hexagon - A six-sided polygon
Octagon – An eight-sided polygon
Parallel – Lines moving in the same direction but always the same distance apart
Pentagon - A five-sided polygon
Perpendicular – Lines that intersect at 90 degree angles
Polygon – A closed figure made up of line segments
Quadrilateral - A four-sided polygon
Rectangle - A quadrilateral with two pairs of congruent sides and four right angles
Square - A quadrilateral with four congruent sides and four right angles
Triangle - A three-sided polygon
GEOMETRY
Circling the Bases
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GEOMETRY
CIRCLING THE BASES
HOUSTON ASTROS IN PARTNER WITH THE NBHOF
APPLICABLE TEKS STATE STANDARDS:
Lesson 2
3.6A, 3.6B, and Process Standards 3.1A, 3.1B, 3.1D, and 3.1G
GEOMETRY
Circling the Bases
Level 1 - Page 2 of 10
GEOMETRY
CIRCLING THE BASES
HOUSTON ASTROS IN PARTNER WITH THE NBHOF
LESSON 2:
LESSON
1| Introduce the term polygon and have students add this word to their Geometry Dictionaries.
2| Explain that a polygon is a plane shape (two-dimensional or “flat”) with straight sides
that connect. The points at which the sides connect are angles. In fact, the word polygon
actually means “many-angles.”
3| Polygons are often named after the number of sides they have. Draw several different
types of polygons on the board, and then label each, demonstrating how the number of
sides gives each polygon its name.
Triangle - A three-sided polygon
Quadrilateral - A four-sided polygon
Pentagon - A five-sided polygon
Hexagon - A six-sided polygon
Octagon - An eight-sided polygon
4| Have students add each polygon to their Geometry Dictionaries.
5| Briefly discuss squares and rectangles. Both shapes are quadrilaterals. Squares have
four congruent sides and four right angles. Rectangles have two congruent sides and
four right angles. Review vocabulary words “congruent” and “parallel” and
“perpendicular.” Have students add each word to their Geometry Dictionaries.
6| Introduce the activity.
GEOMETRY
Circling the Bases
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GEOMETRY
CIRCLING THE BASES
HOUSTON ASTROS IN PARTNER WITH THE NBHOF
LESSON 2:
ACTIVITY
1| First, pass around the Baseball Polygons cards (included). Have students work with a
partner to identify the polygon represented by each baseball item, then sort the shapes
into two piles based on the shapes’ geometric attributes.
2| While students are working, bring out the 7 sheets of poster board and hang them
around the room. Label each with one of the polygons discussed in this lesson: square,
rectangle, triangle, quadrilateral, pentagon, hexagon, and octagon..
3| Have student pairs show and tell how they sorted the Baseball Polygon cards. Review
that there are many different ways that the polygons can be sorted.
4| Have students use glue sticks to attach the Baseball Polygon cards to the appropriate
poster-boards.
5| Next, pass out four index cards to each student. Have students draw a different polygon
from this lesson on each of these cards.
6| When students have finished their drawings, collect the cards. Mix them up and
redistribute them so that each student has four cards drawn by other students.
7| Have students label each card with the correct polygon name, then sort the shapes into
two piles based on the shapes’ geometric attributes. Then, on a separate sheet of paper,
have students write down how the shapes in each pile are alike and how they are different.
8| Finally, have students attach the shapes to the appropriate poster-boards.
GEOMETRY
Circling the Bases
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GEOMETRY
CIRCLING THE BASES
HOUSTON ASTROS IN PARTNER WITH THE NBHOF
LESSON 2:
ACTIVITY - CONTINUED
CONCLUSION:
To conclude this lesson and check for understanding, provide students with the
“Defining Polygons” worksheet (included) and have students work independently to
identify each shape.
GEOMETRY
Circling the Bases
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GEOMETRY
CIRCLING THE BASES
HOUSTON ASTROS IN PARTNER WITH THE NBHOF
LESSON 2:
DEFINING POLYGONS
NAME|
DATE|
INSTRUCTIONS:
Four groups of friends want to play catch.
Identify the different polygons formed by their throwing patterns.
GROUP A
Tomás
GROUP B
Tina
Andrew
Angela
Gina
John
Jason
Mia
GROUP C
GROUP D
Laura
Erika
Jenny
Lee
Brooke
Simon
Juan
Sasha
Liam
Thomas
Mike
Group A|
Group B|
Group C|
Group D|
GEOMETRY
Circling the Bases
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GEOMETRY
CIRCLING THE BASES
HOUSTON ASTROS IN PARTNER WITH THE NBHOF
LESSON 2:
DEFINING POLYGONS ANSWER KEY
Square
1| Group A ____________________________
Rectangle
2| Group B ____________________________
Pentagon
3| Group C ____________________________
Hexagon
4| Group D ____________________________
GEOMETRY
Circling the Bases
Level 1 - Page 7 of 10
GEOMETRY
CIRCLING THE BASES
HOUSTON ASTROS IN PARTNER WITH THE NBHOF
LESSON 2:
BASEBALL POLYGONS
SCOREBOARD
HOME PLATE
GEOMETRY
Circling the Bases
Level 1 - Page 8 of 10
GEOMETRY
CIRCLING THE BASES
HOUSTON ASTROS IN PARTNER WITH THE NBHOF
LESSON 2:
BASEBALL POLYGONS
PITCHING RUBBER
PITCHING SCREEN
GEOMETRY
Circling the Bases
Level 1 - Page 9 of 10
GEOMETRY
CIRCLING THE BASES
HOUSTON ASTROS IN PARTNER WITH THE NBHOF
LESSON 2:
BASEBALL POLYGONS
BASE
PENNANT
BATTER’S BOX
GEOMETRY
Circling the Bases
Level 1 - Page 10 of 10