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kozerog [31]
3 years ago
8

5/6 plus blank equals to 5/2

Mathematics
1 answer:
Tju [1.3M]3 years ago
8 0

Answer:

\frac{5}{3}

Step-by-step explanation:

let blank be O

\frac{5}{6} +O=\frac{5}{2} \\

O=\frac{5}{2} -\frac{5}{6} =\frac{15}{6} -\frac{5}{6} =\frac{10}{6} =\frac{5}{3}

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I need to find the perimeter and area of the regular polygon.
mezya [45]
The area of a polygon is given by the formula Area = ap/2 where a is the length of the apothem and p is the perimeter. The apothem is a line from the center of the polygon perpendicular to a side.

Depending on the formula you know, you can find the length of a side in 1 of 2 ways. 

The first way uses a triangle. Using the radius of the polygon you can create 8 congruent triangles. The center angle will be 360 / 8 = 45 and two side lengths of 20. You can find the length of the base using the law of cosines.

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The second way is to use this formula:
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We need to calculate the perimeter. As there are 8 sides (8)(15.31) = 122.48
Now we need to calculate the apothem using

a = S / (2 tan (180 / n)
a = 15.31 / (2 tan (180 / 8))
a = 18.48

Now solve for the area

Area = ap/2
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3 years ago
I neeed some help here!
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The answer is A because 5 x 3/8 and 15 x 1/8 both equal 15/8. 
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