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3 years ago

15

Please help me i really need help please

1 answer:

Svetllana [295]3 years ago

7 0

Answer:

option 1

Step-by-step explanation:

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Find the area of an octagon with a radius of 6 meters

never [62]

A regular octagon has all its eight sides congruent. The line segments joining each of the vertices of a regular octagon to its center are called the radii of the octagon. These 8 radii divide a regular octagon into 8 congruent isosceles triangles. Area of each isosceles triangle is

$A_{triangle}=\dfrac{1}{2}a^2\sin \alpha$ ,

where a is length of the side of the octagon and $\alpha$ is the angle between two radii of the octagon.

In regular octagon

$\alpha=\dfrac{360^{\circ}}{8}=45^{\circ}$ .

Then the area of regular octagon is

$A_{octagon}=8A_{triangle}=8\cdot \dfrac{1}{2}a^2\sin \alpha=4\cdot (6)^2\cdot \sin 45^{\circ}=4\cdot 36\cdot \dfrac{\sqrt{2}}{2}=72\sqrt{2}$ sq. m.

Answer: $A_{octagon}=72\sqrt{2}$ sq. m.

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4 years ago

5/4 divide by 10/3 =

antoniya [11.8K]

Answer:

0.375

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

If a person lent $500 at 24% simple interest per annum for 8 years, then what is the amount of

ohaa [14]

500 x .24 = 120
120 x 8 = 960
You gain $120 of interest each year after 8 years you’ve gained $960 total in interest

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3 years ago

Which inequality best represents the situation? A contractor charges a flat rate of $150 plus $6 per square foot to install conc

Studentka2010 [4]

The answer would be D) 150 + 6x ≤ 2500.

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3 years ago

The length and width of a rectangle are consecutive odd integers. The perimeter is 72 meters. Find the length and width.

choli [55]

X+x+2+x+x,+2=72
4x+4=72
4x=68
x=17. rectangle is 17 by 19

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4 years ago