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ValentinkaMS [17]
3 years ago
6

Can someone help me find the area of this trapezoid i'm very lost

Mathematics
1 answer:
spin [16.1K]3 years ago
4 0
Im pretty sure you asked this question before but the answer is 48m^2
formula for the area of a trapezoid is A=1/2(b1+b2)*h
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The diagram below shows a square inside a regular octagon. The apothem of the octagon is 15.69 units. To the nearest square unit
Musya8 [376]

Answer:

C.  647 square units

Step-by-step explanation:

To find the shaded area, subtract the area of the unshaded square from the area of the octagon.

<u>Area of the octagon</u>

\textsf{Area of a regular polygon}=\dfrac{n\:l\:a}{2}

where:

  • n = number of sides
  • l = length of one side
  • a = apothem

Given:

  • n = 8
  • l = 13
  • a = 15.69

Substitute the given values into the formula and solve for A:

\implies \textsf{Area}=\sf \dfrac{8 \cdot 13 \cdot 15.69}{2}

\implies \textsf{Area}=\sf \dfrac{1631.76}{2}

\implies \textsf{Area}=\sf 815.88\:\:square \:units

<u>Area of the square</u>

\implies \textsf{Area}=\sf 13^2=169 \:\:square \:units

<u>Area of the shaded region</u>

= area of the octagon - area of the square

= 815.88 - 169

= 646.88

= 647 square units (nearest square unit)

3 0
2 years ago
Read 2 more answers
Write down the multiples of each number vertically and horizontally
Rashid [163]

Answer:

1

6

4

10

14

18

8

16

12

4

6

8

10

12

14

16

18

26

Step-by-step explanation:

8 0
3 years ago
a bag contains only a red and blue marbles there are a total of 36 marbles in the back there are five red marbles for every four
Harrizon [31]
Let R and B be the number of red and blue marbles respectively.

Then,
R+B = 36
R:B = 5:4

Therefore,
Ratio of red marbles = 5/9
Ratio of blue marbles = 4/9
This means,
R = 5/9*36 = 20 marbles
B = 4/9*36 = 16 marbles

If one blue marble is removed from the bag, the  new B= 16-1 = 15 blue marbles  and the new total of marbles in the bag = 36-1 = 35 marbles.
The new ratios are
R = 20/35 =4/7
B = 15/35 = 3/7
That is, R:B = 4:3

The reasoning of the student is wrong. When a marble is removed, both the number of blue marbles changes as well as the total of the marbles in the bag. In other words, both the values in the ratio reduce by 1.
7 0
3 years ago
Arrange the numbers as they appear from left to right on a horizontal number line. -2.76, 2.5, 2.85, -1.58, -1.85, -2.57, -2.5
svp [43]

Answer:

-2.76  -2.57  -2.5  -1.85 -1.58  2.5  2.85

   |           |         |        |        |       |        |

--------------------------------------------------------

-3                                            0                3

I hope this helped (not sure if I did it right) :D

Step by step explanation:

3 0
3 years ago
Elena walked 20 minutes more than Lin. Jada walked twice as long as Elena. Jada walked for 90 minutes. The equation 2(x+20) = 90
alisha [4.7K]

Answer:

5 21 ²48⁴95839383838462901747493948

7 0
2 years ago
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