If there are 16 dark blue triangles,then how much fabric was used if each leg is 10 cm and the hypotenuse is 14.2 cm long?
10+10=14.2?
First of all , if you have a "hypotenuse", then you must have a right-angled triangle.
If the sides are 10 cm each, then the area of one triangle = (1/2)(10)(10) = 50 cm^2
Assuming you have 16 of those, then the total area is 800 cm^2
btw, the hypotenuse would be
√(10^2 + 10^2) = √200 = appr 14.1 , not as given