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27.09.2019 •
Mathematics
If a t-shirt is regularly priced at $40.00 but is now on sale for 45% off, what is the price of the shirt and how much are on you saving?
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Ответ:
You saving $27
Ответ:
Check the picture below.
since we know the radius of the larger semicircle is 8, thus its diameter is 16, which is the length of one side of the equilateral triangle. We also know the smaller semicircle has a radius of 1/3, and thus a diameter of 2/3, namely the lenght of one side of the small equilateral triangle.
now, if we just can get the area of the larger figure and the area of the smaller one and subtract the smaller from the larger, we'll be in effect making a hole/gap in the larger and what's leftover is the shaded figure.