GoMath Chapter 13

We are skipping chapter 12 for now and moving on to chapter 13.  We will come back to 12 after chapter 13.  In chapter 13 we will be learning about perimeter and area.  We will explore the concept that area is a measure of how many square units cover a flat surface. We will also learn the formula for finding the area of a rectangle.

Important Chapter Vocabulary
1.  Area;  The number of square units needed to cover a flat surface.
2.  Base;  Any side of a two-dimensional figure
3.  Formula;  A set of symbols that expresses a mathematical rule.
4.  Height;  The measure of a perpendicular from the base to the top of a two-dimensional figure.
5.  Perimeter;  The distance around a figure.
6.  Square Unit;  A unit of area with dimensions of 1 unit x 1 unit.

Formula for perimeter of a rectangle;   (2 x length) + (2 x width) =

                                                      
                                                          (2 x 7) + (2 x 3) = ?
                                                             14   +   6 =   20
                                                               perimeter = 20

Formula for perimeter of a square;  (4 x one side) =

                                                        
                                                                (4 x 4) = 16 
                                                             perimeter = 16

Formula for area;  (base x height)

                                   
                                
                                            (7 units x 4 units) = 28 square units
                                                         area = 28 square units