40563

1.
= if the first picture has 33 cm and the second one has 13 it means it goes down 20 cm so the height is 7 cm and width is 3cm so 7cm + 7cm + 3cm + 3cm = 20 cm perimiter
2.
= 12 cm2 area so the perimitrer is 16 cm because if the whole thing is 60 and 1 rectangle is an even fith of it than it is 1 fith of 60 which is 5 meaning that if 2 is at the top then 6 is at the side those two numbers multiplied equals 12 and if you ad 2 + 2 +6 + 6=16cm perimiter.
3.
=100mm because if the whole of the rectangle is 600mm and there is 6 of the smaller rectangles that make up the whole one. This means that each smaller rectangle must have a area of 100mm so the width is smaller than the height and if you multiply the two numbers together they have to equal 100 mm. 5mm in height and 20cm in length = 100mm which makes sense therefore 20mm + 20mm + 5mm +5mm= 50cm perimiter.
4.
=20cm2 because the area of the whole is 180 and there are 9 smaller rectangles making the whole and 2 x 9 is 18 then, since we are working with hundreds, the 2 would instead become 20 giving us an area of 20cm. 20cm will have a slightly smaller number in width than height and both numbers multiplied will make 20cm so that means the numbers that most make sense are 4cm in width and 5cm in height. so 5cm + 5cm + 4cm + 4cm=18cm perimiter.