How many hours would someone who earns 6.25 per hour have to work to earn 225.65

I don’t know how to use the triangle area to calculate the area of the inscribed polygons

Trava [24]

First of all, let's recall the area of a triangle, knowing its base (b) and height (h):

$A = \cfrac{bh}{2}$

The exercise is showing you that, if you inscribe a polynomial with more and more side, the area of the polynomial will approximate the area of the circle better and better (you can see youself that the polygon is "filling" the circle more and more as the number of sides increase).

Now, the second column tells you the area of each of the triangles the polygon is split into. So, we can see that the first polygon is split into 3 triangles, each of them having base 1.73 and height 0.5.

So, the area of each triangle is

$A = \cfrac{1.73 \cdot 0.5}{2} = 0.4325$

There are three of these triangles, so the area of the whole polygon is

$A = 0.4325 \cdot 3 = 1.2975$

In the second case, you have six triangles, each with base 1 and height 0.87. So, the whole area is

$A = 6 \cdot \cfrac{1\cdot 0.87}{2} = 0.87 \cdot 3 = 2.61$

Finally, in the last case you have 8 triangles, each with base 0.77 and height 0.92. So, the whole area is

$A = 8 \cdot \cfrac{0.77\cdot 0.92}{2} = 0.77\cdot 0.92 \cdot 4 = 2.8336$

3 0

3 years ago

Select the correct answer from each drop-down menu.

yaroslaw [1]

The length of the bigger piece is 28 and the total length is 40

7 0

2 years ago

John has decided to prepare an old field for his son's new horse. the length of the field is 10 meters less than 4 times its wid

tatuchka [14]

Answer: The total money invested in the field will be $1,623.80

Step-by-step explanation:

step 1

Find the dimensions of the field

Let

x -----> the length of the field

y -----> the width of the field

p=2(x+y)

p(4.80)=1,584

p=330m

we know that

The perimeter of the field is equal to

so

330=2(x+y)----> equation A

x=4y-10 ------> equation B

substitute equation B in equation A and solve for y

330=2(4y-10+y)

165=(5y-10)

5y=165+10

y+35

Find the value of x

x=4(35)-10+130

therefore

The length of the field is 130 meters and the width of the field is 35 meters

step 2

Find the area of the field

The area of the field is

A=xy

substitute

A=(130)(35)=4,550m2

step 3

Find the number of bags of seed

Divide the area by 460

4,550/460=9.89 bags

Round up to the nearest whole number

9.89 bags=10 bags

step 4

Find the cost of the seed

(10 )(3.98)=$19.8

step 5

Find the total money invested in the field

1,584+$39.8=$1,623.80

7 0

2 years ago

Read 2 more answers

Mrs. Myles gave the same test to both her first and third period class. In first period, the median was 75 and the range was 30.

dolphi86 [110]

<span>D) There is not enough information to know if any of these is true.</span>

7 0

3 years ago

Jason downloaded 288 pictures from his camera of the pictures 38% are of his family about how many pictures are of his family

Angelina_Jolie [31]

turn your percentage into a decimal. so 38. move your decimal 2 places to the left. which = .38
you do 288×.38=109.44

round the answer since it's 4 you make it 109

hope this helped :)

5 0

3 years ago