Everyday Math Grade 4 – Lesson 1.5 Polygons Copyright © 2010 Kelly Mott.

Everyday MathGrade 4 – Lesson 1.5

Polygons

Copyright © 2010 Kelly Mott

Lesson Components:Part 1: Math Boxes 1.5 Page 11Part 2: Geometry ReviewPart 3: PowerPoint LessonPart 4: Turning Point QuizPart 5: Math Journal Page 10Part 6: Polygon Poster



Math Boxes Lesson 1.5


Math Box 1:

100Th

10Th Th H T O


Math Box 2:


Math Box 3:


Math Box 4:


Math Box 5:


Math Box 6:


GEOMETRYREVIEW

ACopyright © 2010 Kelly Mott

Name the FigurePoint

BA


Name the FigureLine Segment

A B C


Name the FigureLine

BA


Name the FigureRay

A

BC

Name the Angle


Right Angle

90 degrees


Name the AngleAcute Angle

Less than 90 degrees


Name the AngleObtuse Angle

Greater than 90 degrees and less than 180 degrees


Name the AngleStraight Angle

180 degrees

Name the Triangle


Right Triangle

Name the Triangle


Isosceles Triangle

Name the Triangle


Equilateral Triangle

Name the Triangles


Scalene Triangle

Name the Quadrangle

4


Rectangle

Name the Quadrangle

4Copyright © 2010 Kelly Mott

Square

Name the Quadrangle


Rhombus

Name the Quadrangle


Trapezoid

Name the Quadrangle


Kite

What kind of lines are these?


Parallel Lines

• These are all parallelograms:

Parallelograms


rectangle rhombus parallelogram square

• These are not parallelograms:

Not Parallelograms


kite trapezoid


Lesson 1.5Skill: Polygons

Part 1: What is a polygon?


Video:http://www.brainpop.com/math/geometryandmeasurement/polygons/

Copyright © 20010Kelly Mott

http://www.brainpop.com/math/geometryandmeasurement/polygons/



x A polygon is a flat, closed figure with _____ or

more sides.

A polygon is a flat, closed figure with _____ or

more sides.

Polygons Not Polygons

Polygons


Practice 1: Is it a polygon?A.

Yes or NoCopyright © 2010 Kelly Mott

B.

Yes or No

Practice 2: Is it a polygon?C.


D.

Yes or No

Practice 3: Is it a polygon?E.


F.

Yes or No

Practice 4: Is it a polygon?G.


H.

Yes or No

Part 2: Special Polygons


• A triangle has _____ sides, _____vertices, and _____ angles.

• Hint: A vertex is where two lines meet. An angle is the space between the intersection of the two lines.

Triangle


Circle all of the Triangles (6)


• A rectangle has _____ sides, _____vertices, and _____ angles.

Rectangle


Circle all of the Rectangles (5)


• A square has _____ sides, _____vertices, and _____ angles.

Square


Circle all of the Squares (5)


• A pentagon has _____ sides, _____vertices, and _____ angles.

Pentagon


Circle all of the Pentagons (5)


• A hexagon has _____ sides, _____vertices, and _____ angles.

Hexagon


Circle all of the Hexagons (5)


• A heptagon has _____ sides, _____vertices, and _____ angles.

Heptagon


Circle all of the Heptagons (5)


• A octagon has _____ sides, _____vertices, and _____ angles.

Octagon


Circle all of the Octagons (4)


• A nonagon has _____ sides, _____vertices, and _____ angles.

Nonagon


Circle all of the Nonagons (3)


• A decagon has _____ sides, _____vertices, and _____ angles.

Decagon


Circle all of the Decagons (3)


Part 3: Match the Polygons


Pentagon

Decagon

Heptagon

Match the Polygons 1


Square

Octagon

Nonagon



Hexagon

Rectangle

Triangle



Part 4: Convex and Concave Polgons


• A convex polygon is a polygon in which all sides are pushed outward.

• A concave polygon is a polygon in which at least two sides are pushed in.


Convex Polygons

Practice 1: Is it convex or concave?A.

Convex or Concave


B.

Convex or Concave

Practice 2: Is it convex or concave?C.

Convex or Concave


D.

Convex or Concave

Practice 3: Is it convex or concave?E.

Convex or Concave


F.

Convex or Concave

Practice 4: Is it convex or concave?G.

Convex or Concave


H.

Convex or Concave

Part 5: Turning Point Quiz


Name the Polygon:

Deca

gon

Hepta

gon

Triangle

0% 0%0%

1. Decagon2. Heptagon3. Triangle


10

Name the Polygon:

Hexa

gon

Pentagon

Hepta

gon

0% 0%0%

1. Hexagon2. Pentagon3. Heptagon


5

Name the Polygon:

Octa

gon

Nonagon

Deca

gon

0% 0%0%

1. Octagon2. Nonagon3. Decagon


8

Name the Polygon:

Square

Rectangle

Triangle

0% 0%0%

1. Square2. Rectangle3. Triangle


3

Name the Polygon:

Octa

gon

Square

Hepta

gon

33% 33%33%


1. Octagon2. Square3. Heptagon

4

Name the Polygon:

Hexa

gon

Pentagon

Nonagon

0% 0%0%

1. Hexagon2. Pentagon3. Nonagon


6

Name the Polygon:

recta

ngle

square

decago

n

33% 33%33%


1. rectangle2. square3. decagon

4

Name the Polygon:

Hexa

gon

Hepta

gon

Octa

gon

0% 0%0%

1. Hexagon2. Heptagon3. Octagon


7

Name the Polygon:

Nonagon

Pentagon

Deca

gon

0% 0%0%

1. Nonagon2. Pentagon3. Decagon


9

Is it Convex or Concave?


1. Convex2. Concave



Convex

Concave

50%50%1. Convex2. Concave


Convex

Concave

50%50%


1. Convex2. Concave



Convex

Concave

50%50%1. Convex2. Concave


Convex

Concave

50%50%


1. Convex2. Concave

How did you do?


CLASSWORK/HOMEWORKEveryday Math Journal Page: 10



HOMEWORK

CLASSWORK/HOMEWORKPoster Showing Types of Polygons


Polygons


9 squarenonagon decagon

octagon

heptagon

triangle

rectangle

hexagon

pentagon

9

5

38

10

6

74

4

Polygons


99

5

38

10

6

7 4

4

Poster Showing Convex and Concave

Convex Concave


Everyday Math Grade 4 – Lesson 1.5 Polygons Copyright © 2010 Kelly Mott.

Documents

Transcript of Everyday Math Grade 4 – Lesson 1.5 Polygons Copyright © 2010 Kelly Mott.