100 cm2
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Area = 5*2 = 10 square cm
It is: 10cm because 10*10 = 100 square cm
If the hypotenuse has been rounded to 2 decimal places then using Pythagoras the length of the other leg is also 10 cm. Area of the triangle: 0.5*10*10 = 50 square cm
A square with a side length of 2 cm has an area of 4 square cm.
area = length x width area = 12 x 10 = 120 square cm