WAL how to find the perimeter and area of some classroom objects.

Term 4

OBJECT | PERIMETER | AREA |

Formula | P= 2 (L + B) mm,cm,m | A = L x B/W (sq mm,sq cm,sq m) |

Maths book | P = 2(l+b) 2X ( 20cm+25cm) 2X 45cm=90cm | L = 20cm B =25cm 20X25=500 A =500 sq cm |

Modelling book | P = 2(l+b) 2X (40cm+31cm) 2X 71cm=142cm | L = 40cm B =31cm 40X31= A =1240 sq cm |

Large Rectangular Table | P = 2(l+b) 2X (160cm+120cm) 2X 280cm=560cm | L = 160cm B =120cm 160X120= A =19200 sq cm |

Tote tray | P = 2(l+b) 2X (39cm+27cm) 2X 66cm=132cm | L = 39cm B =27cm 39X27= A =1053 sq cm |

My Reflection

At the start I found the whole thing tricky because I had forgotten how to do the length and the breadth but at the end I found it easy.

I found measuring the length and the breadth easy to measure because at my dad would measure things a lot and he had taught me when I was little.

My next step is do more area and perimeter in my spare time.

I enjoyed measuring the objects in the class and I also enjoyed multiplting the 2 by the the centimeters that I added up.