danielaguardado63
28.01.2020 •
Mathematics
Find the area of this shaded region.
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Ответ:
9.13
Step-by-step explanation:There are three lines from the center to the sides. So they are all the same. you can see that the radius is 8 from one of the sides. You can find the area of the big triangle by knowing that 2 of the sides are 8 and 360-270=90 and that is a right triangle so we can use the pythagorean theorem to find the hypotenuse. 8^2+8^2=√128. And we can find the area by doing (8^2+8^2)/2=32 so each triangle is 16 units^2. To find out the lengths of the left triangle we have (.5*√128)^2=√32. So 8^2-32=x² x=√32. if the radius is 8 and the one side of the radius is √32 it would be 8-√32. and the other line touching the shaded area it √128 so we can say that the area of the non-little circle is the area of the whole circle-the almost circle. The area of the whole circle it 8^2*pi≈201.06. The area of the almost circle is 201.06*.75=150.79 because 270/360=.75 plus the area of the triangle (32) so the area is 182.79. So the area of the little thing is 201.06-182.79=18.27 divided by 2 =9.13
Ответ:
8/9n - 1 1/3
BTW * MEANS TIMES
Step-by-step explanation:
Given that: 4/9(2n - 3) [1]
The distributive property says that:
a * (b + c) = a * b + a* c
Apply the distributive property in equation [1] we get;
4/9 * 2n + 4/9 * (-3)
Simplify:
8/9n - 4/3
We can write 4/3 in mixed fraction as:
4/3 = 1 1/3
then;
8/9n - 1 1/3
Therefore, the expression which is equivalent to 4/9(2n - 3) is, 8/9n - 1 1/3