jro20
01.02.2021 •
Mathematics
The movement of the progress bar may be uneven because questions can be wor Find the area of the figure below, formed from a triangle and a rectangle, in square centimeters.
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Ответ:
p=2(l+w)
p/2=l+w, using l found in the beginning
p/2=3w-4+w
p/2=4w-4
p/2+4=4w
w=p/8+1, since p=40
w=40/8+1=6, and since l=3w-4
l=18-4=14
So the dimensions of the rectangle are 14 units in length by 6 units in width.