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To find the area you need to first find the height. Once you have the height of the triangle find the length of the base. For an obtuse any side of the figure can be considered the base. So measure one of the sides and insert it into the formula area=1/2x(base x height)

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's