Lesson-Area of a rectangle
Learning Intention:
Learning Intention:
Find areas of rectangles and volumes of cuboids by applying multiplication
Find areas of rectangles and volumes of cuboids by applying multiplication
Do Now:
Do Now:
Which unit is most suitable for measuring the:
Which unit is most suitable for measuring the:
a) Height of a door?
a) Height of a door?
b) Distance between Tauranga and Auckland?
b) Distance between Tauranga and Auckland?
c) Length of a rat’s tail?
c) Length of a rat’s tail?
d) Length of a cow from nose to tail tip?
d) Length of a cow from nose to tail tip?
e) Height of a year nine student?
e) Height of a year nine student?
f) Height of Mt Ruapehu?
f) Height of Mt Ruapehu?
g) Height of the Sky Tower in Auckland
g) Height of the Sky Tower in Auckland
h) The thickness of your fingernail
h) The thickness of your fingernail
Activity
Activity
1) In your Maths exercise book, draw as many different rectangles that you can that only have 24 squares.
1) In your Maths exercise book, draw as many different rectangles that you can that only have 24 squares.
2) Complete the table:
2) Complete the table:
3) Copy and complete the table below for a rectangle with 36 squares:
3) Copy and complete the table below for a rectangle with 36 squares:
3) What is the relationship between rows and columns and number of squares?
3) What is the relationship between rows and columns and number of squares?
Extension:
Extension:
1) A certain rectangular shape has an area of 60 square units, what might the length of its sides be?
1) A certain rectangular shape has an area of 60 square units, what might the length of its sides be?
2) You have been given 36 metres of string to ‘rope off’ a rectangular area that can be made in to a vegetable garden. What is the largest rectangular garden you can make?
2) You have been given 36 metres of string to ‘rope off’ a rectangular area that can be made in to a vegetable garden. What is the largest rectangular garden you can make?
Justify your choice, using diagrams and or tables of information.
Justify your choice, using diagrams and or tables of information.
3) Maths workbook:
3) Maths workbook: