W/c 18 Jan - FS lesson (perimeter and area)

W/C 18 Jan - FS lesson (Perimeter and Area)

Aim of the lesson

• Calculate the perimeter of squares and rectangles

• Calculate the area of squares and rectangles

• Calculate the permeiter and area of shapes that are made up of a combination of rectangles

Perimeter

• the distance around the edge of the shape. Measured in cm, m, mm.

• Add all sides to find perimeter

Area

• the amount of space the shape takes up. Measured in cm², m²,  mm².

• Multiply length by width

Fill in the Blank

Find the perimeter of the square (the sides are 5 m)

Find the perimeter of the square (the sides are 5 m)

• 5 m + 5m + 5m + 5m = 20 m

Multiple Choice

Find the area of the square (the sides are 5 cm)

•  $20m^2$  

•  $25m^2$  

•  $25m$  

•  $20m$  

Find the area of the square (the sides are 5 cm)

 $5m\ \times\ 5m\ =\ 25m^2$  

Multiple Choice

If the area of a square is  $36cm^2$  , what is the length of one side the square?

• 6cm

• 4cm

• 6mm

• 4mm

If the area of a square is 36cm2, what is the length of the square?

Length and width are the same.
36 is a square number because 6 x 6 = 36
Therefore, the length of the square is 6cm.

Fill in the Blank

Find the perimeter (the sides are 6cm and 9cm)

Find the perimeter

6cm + 6cm + 9cm + 9cm = 30cm

Multiple Choice

Find the area (sides: 6cm and 9cm)

•  $54cm^2$  

•  $30cm^2$  

•  $42cm^2$  

•  $36cm^2$  

Find the area

 $6cm\ \times\ 9cm\ =\ 54cm^2$  

Multiple Choice

What is the perimeter of this shape

• 27cm

• 28cm

• 25cm

• 24cm

What is perimeter of this shape?

5cm + 2cm +3 cm + 6cm +

3 cm + 5cm + 4 cm =

28cm

Multiple Choice

How to find the area of this shape?

• Add areas of both rectangles (5x4+3x6)

• Multiply the longest sides

• add all sides together

How to find the area of this shape?

Add areas of both rectangles (5x4+3x6) $5cm\times4cm\ +3cm\times6cm\ =$  

 $20cm^2+18cm^2\ =$  
 $38cm^2$  

Poll

LO: Calculate the perimeter of squares and rectangles

• 1. I understand the very well

• 2. I need more practice

• 3. I don't understand

Poll

LO: Calculate the area of squares and rectangles

• 1. I understand this very well

• 2. U need more practice

• 3. I don't understand

Poll

LO: Calculate the permeiter and area of shapes that are made up of a combination of rectangles

• 1. I understand it very well

• 2. I need more practice

• 3. I don't understand.