Copyright Tim Morris/St Stephen's School Area of a Rectangle www.mathxtc.com This is one in a series of Powerpoint slideshows to illustrate how to calculate the area of various 2-D shapes. Start with the Rectangle, then move onto the Parallelogram. After that select any of Triangle, Trapezium and Circle. Please feel free to copy and modify any of these slide shows, but make sure you acknowledge the author when doing so. Copyright Tim Morris/St Stephen's School

Copyright Tim Morris/St Stephen's School RECTANGLE What is the area of this rectangle? W=width Copyright Tim Morris/St Stephen's School

DIVIDE IT UP INTO SQUARES! RECTANGLE What is the area of this rectangle? H=height W=width DIVIDE IT UP INTO SQUARES! Copyright Tim Morris/St Stephen's School

CHOOSE STANDARD SIZE SQUARE! RECTANGLE What is the area of this rectangle? H=height W=width CHOOSE STANDARD SIZE SQUARE! Copyright Tim Morris/St Stephen's School

CHOOSE STANDARD SIZE SQUARE! RECTANGLE What is the area of this rectangle? 7 14 21 28 35 42 49 56 63 6 13 20 27 34 41 48 55 62 5 12 19 26 33 40 47 54 61 H=height 4 11 18 25 32 39 46 52 60 3 10 17 24 31 38 45 52 59 2 9 16 23 30 37 44 51 58 1 8 15 22 29 36 43 50 57 W=width CHOOSE STANDARD SIZE SQUARE! Copyright Tim Morris/St Stephen's School

Copyright Tim Morris/St Stephen's School RECTANGLE What is the area of this rectangle? 7 14 21 28 35 42 49 56 63 6 13 20 27 34 41 48 55 62 5 12 19 26 33 40 47 54 61 H=height 4 11 18 25 32 39 46 52 60 3 10 17 24 31 38 45 52 59 2 9 16 23 30 37 44 51 58 1 8 15 22 29 36 43 50 57 W=width COUNT THE SQUARES…63 Copyright Tim Morris/St Stephen's School

AREA = 63 STANDARD SQUARES RECTANGLE What is the area of this rectangle? 7 14 21 28 35 42 49 56 63 6 13 20 27 34 41 48 55 62 5 12 19 26 33 40 47 54 61 H=height 4 11 18 25 32 39 46 52 60 3 10 17 24 31 38 45 52 59 2 9 16 23 30 37 44 51 58 1 8 15 22 29 36 43 50 57 W=width AREA = 63 STANDARD SQUARES Copyright Tim Morris/St Stephen's School

BUT THERE IS ANOTHER WAY! RECTANGLE 7 What is the area of this rectangle? 6 5 H=height 4 3 2 1 W=width BUT THERE IS ANOTHER WAY! Copyright Tim Morris/St Stephen's School

Copyright Tim Morris/St Stephen's School RECTANGLE 7 What is the area of this rectangle? 6 5 H=height 4 3 2 1 W=width COUNT THE ROWS…7 Copyright Tim Morris/St Stephen's School

Copyright Tim Morris/St Stephen's School RECTANGLE What is the area of this rectangle? 7 6 5 H=height 4 3 2 1 2 3 4 5 6 7 8 9 W=width COUNT THE COLUMNS…9 Copyright Tim Morris/St Stephen's School

THERE ARE 7 ROWS OF 9 COLUMNS RECTANGLE What is the area of this rectangle? 7 6 5 H=height 4 3 2 1 2 3 4 5 6 7 8 9 W=width THERE ARE 7 ROWS OF 9 COLUMNS Copyright Tim Morris/St Stephen's School

THERE ARE 7 x 9 = 63 STANDARD SQUARES RECTANGLE What is the area of this rectangle? 7 6 5 H=height 4 3 2 1 2 3 4 5 6 7 8 9 W=width THERE ARE 7 x 9 = 63 STANDARD SQUARES Copyright Tim Morris/St Stephen's School

Copyright Tim Morris/St Stephen's School RECTANGLE 7 What is the area of this rectangle? 6 Arearectangle = Rows x Columns = Width x Height 5 H=height 4 3 2 1 2 3 4 5 6 7 8 9 W=width Copyright Tim Morris/St Stephen's School

Arearectangle = Width x Height (perpendicular height H) H=height W=width Copyright Tim Morris/St Stephen's School