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Alright, buckle up buttercup. To add 45cm to 1m 74cm, first convert 1m to 100cm. So you have 100cm + 74cm + 45cm = 219cm. Therefore, 45cm added to 1m 74cm is 2m 19cm. Hope that clears things up for ya!
It is: 70cm+1m 40cm = 2m 10cm
There are only two sides given. Two sides cannot form a polygon so it must be assumed that the shape is lenticular (shaped like a lens) and then, its perimeter is 2m 65cm + 1m 80cm = 4m 45cm.
45cm
2m is 200cm..