WALT 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)

P=2(25 cm+19 cm)

P=2(44 cm)

P=88 cm

A=LxB

A=25 cm x 19 cm

A=475 sq cm

Modelling book

P=2(L+B)

P=2(39 cm+31 cm)

P=2(70 cm)

P=140 cm

A=LxB

A=39 cm x 31 cm

A=1209 sq cm

Large Rectangular Table

P=2(L+B)

P=2(40 cm+27 cm)

P=2(67 cm)

P=134 cm

A=LxB

A=40 cm x 27 cm

A=1080 sq cm

Tote tray

P=2(L+B)

P=2(126 cm+80 cm)

P=2(206 cm)

P=412 cm

A=LxB

A=126 cm x 80 cm

A=80208 sq cm

My Reflection

Something I found tricky was working out the area

Something I learnt was learning how to measure perimetre

My next step is to find a better strategy to work out the Area