Everyday Math Grade 4 – Lesson 1.5 Part 2: Convex & Concave Polygons Copyright © 2010 Kelly Mott

Everyday MathGrade 4 – Lesson 1.5

Part 2: Convex & Concave Polygons

Copyright © 2010 Kelly Mott


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:


REVIEW

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

What kind of line segments are these?


Parallel Line Segments

What kind of rays are these?


Parallel Rays


Lesson 1.5Skill: Polygons

Part 1: Polygon Review


xTo be a polygon, the shape has to be:

1. _____________________________

2. _____________________________

3. _____________________________

To be a polygon, the shape has to be:

1. _____________________________

2. _____________________________

3. _____________________________

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.

Yes or NoCopyright © 2010 Kelly Mott

D.

Yes or No

Part 2: Name the Polygon


Name the PolygonA.

Name: ________________Sides: ________________Vertices:______________Angles: _______________


B.


Name the PolygonC.



D.


Name the PolygonE.



F.


Practice 4: PolygonsG.



H.


Practice 5: PolygonsI.



Part 3: Turning Point Quiz


Name the Polygon:

1. Decagon2. Heptagon3. Triangle


10

Name the Polygon:

1. Hexagon2. Pentagon3. Heptagon


5

Name the Polygon:

1. Octagon2. Nonagon3. Decagon


8

Name the Polygon:

Square

Rectangle

Triangle

0% 0%0%

1. Square2. Rectangle3. Triangle


3

Name the Polygon:


1. Octagon2. Square3. Heptagon

4

Name the Polygon:

1. Hexagon2. Pentagon3. Nonagon


6

Name the Polygon:


1. rectangle2. square3. decagon

4

Name the Polygon:

1. Hexagon2. Heptagon3. Octagon


7

Name the Polygon:

1. Nonagon2. Pentagon3. Decagon


9


How did you do?


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


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


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?


HOMEWORKEveryday Math Journal Page: 10

Copyright © 20010Kelly Mott


HOMEWORK


HOMEWORK


HOMEWORK


HOMEWORKPoster Showing Convex and Concave


Poster Showing Convex and Concave

Convex Concave



Documents

Everyday Math Grade 4 – Lesson 1.5 Part 2: Convex & Concave Polygons Copyright © 2010 Kelly Mott