area and perimeter

transcript

SHEEBA JOHNK V PATTOM

SHIFT 1

CLASS VMATHS

AREA AND ITS BOUNDARY

Finding the Perimeter

SHEEBA JOHN

KVPATTOM,SHIFT1

Take a walk around the edge!Take a walk around the edge!

The perimeter is…The perimeter is…

60 cm !60 cm !

This shape has sides of 5 cm each

32 cm !32 cm !

This is a regular octagon with sides 4 cm

1212 1616

28283232

8cm8cm

26 cm !26 cm !8cm8cm

6cm6cm

10 cm10 cm

32cm !32cm !

661616

The farmer wants to re-build the rectangular goat pen, but has only 36m of fencing and cannot remember the exact dimensions from the first pen.

Can you help ?

Remember:

• the pen is rectangular

• only 36m of fence can be used

L.O. Investigating perimeter - finding all possibilities

A farmer has a goat pen which uses 36 m of fencing.

One night, during a storm, the goat pen is destroyed.

L.O. calculating area and perimeter

5.5 cm

55 cm² 30 cm²

15.5 cm² 25 cm²

30 cm² 72 cm²

18 cm² 36 cm²

4.5 cm

18 cm² 13 cm²

32 cm² 9 cm²

30 cm² 26 cm²

30 cm² 36 cm²

30 cm² 50 cm²

15 cm² 25 cm²

Find perimeter

30 cm 21 cm

20 cm 10 cm

Find perimeter

30 cm 40 cm

128 cm 20 cm

Find perimeter

30 cm 16 cm

15 cm 20 cm

Find perimeter

14 cm 66 cm

55 cm 34 cm

Find perimeter

30 cm 50 cm

15 cm 25 cm

THANK YOU

area and perimeter

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