Answer: C, D
Step-by-step explanation:
edge2021
Answer:
A platonic solid is a three-dimensional shape whose faces are all the same shape and whose corners are the meeting place of the same number of polygons.
Step-by-step explanation:
The value of n is 10.
Solution:
Given expression:
![$-2+\frac{4n}{5} =6](https://tex.z-dn.net/?f=%24-2%2B%5Cfrac%7B4n%7D%7B5%7D%20%3D6)
<u>To solve this expression:</u>
![$-2+\frac{4n}{5} =6](https://tex.z-dn.net/?f=%24-2%2B%5Cfrac%7B4n%7D%7B5%7D%20%3D6)
Add 2 on both sides of the expression.
![$-2+\frac{4n}{5}+2 =6+2](https://tex.z-dn.net/?f=%24-2%2B%5Cfrac%7B4n%7D%7B5%7D%2B2%20%3D6%2B2)
![$\frac{4n}{5}=8](https://tex.z-dn.net/?f=%24%5Cfrac%7B4n%7D%7B5%7D%3D8)
Multiply by 5 on both sides of the expression, we get
4n = 40
Divide by 4 on both sides of the expression, we get
n = 10
Hence the value of n is 10.
The regular octagon has eight equal sides. Then the area of the regular octagon of side length be 4.6 is 102 ft².
<h3>What is a regular octagon?</h3>
It is a polygon that has eight equal sides. In a regular octagon, the opposite sides are parallel. And its diagonals are also equal and intersect at mid-point.
Given
A regular octagon has a radius of 6 ft and a side length of 4.6 ft.
We know the formula for the regular octagon.
Area of the regular octagon = 2(1 +
) a²
Where a be the side of a regular octagon.
Then the area of the regular octagon will be.
![\rm Area = 2 (1+\sqrt{2} ) a^2\\\\Area = 2*(1 + 1.414) *4.6^2\\\\Area = 2 * (2.414)* 21.16\\\\Area = 102.16](https://tex.z-dn.net/?f=%5Crm%20Area%20%3D%202%20%281%2B%5Csqrt%7B2%7D%20%29%20a%5E2%5C%5C%5C%5CArea%20%3D%202%2A%281%20%2B%201.414%29%20%2A4.6%5E2%5C%5C%5C%5CArea%20%3D%202%20%2A%20%282.414%29%2A%2021.16%5C%5C%5C%5CArea%20%3D%20102.16)
Thus, the area of the regular octagon of side length be 4.6 is 102 ft².
More about the regular octagon link is given below.
brainly.com/question/858868
Answer:
50.24
Step-by-step explanation:
The formula for the area using diameter is A=1/4πd^2. So just plug the 8 into the formula, A=1/4π8^2, and solve. The answer will come out to be 50.27 which is the closest to 50.24.