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Dominik [7]
3 years ago
9

Help me find the perimeter of this figure.

Mathematics
2 answers:
Alik [6]3 years ago
5 0

Answer:

8+10+8+10=36+   2 x 3.14 x radium/2

Step-by-step explanation:

Vlada [557]3 years ago
3 0

look at the semicircle

area of semicircle

{ \boxed{ \bold{ \red{A = \pi \:  \times  {r}^{2} }}}}

{ \bold{ \boxed{ \red{radius =  \frac{diameter}{2} } }}}

radius =  \frac{8}{2}  =  \boxed{4}

area =  3.14  \times  {4}^{2}  \\ area = 50.24

as we can see that is a parallelogram

so ,

area of parallelogram

\boxed {\bold{ \red{area \: of \: parallelogram =b \times h }}}

area \:  = 8 \times 10 \\ are \:  = 80in

area of fig = area of semicircle + area of parallelogram

total area = 50.24+80

total area = 130.24 in²

\boxed{130.24 {in}^{2} }

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Mrs. Martini is 6 years more than 3 times as old as Tony. Eight years ago, she
zalisa [80]

Mrs Martini age is 42 years and Tony age is 12 years

Step-by-step explanation:

The given is:

  • Mrs. Martini is 6 years more than 3 times as old as Tony
  • Eight years ago, she  was 2 years less than 9 times as old as he was then

Assume that Tony is x years old now

∵ Mrs. Martini is 6 years more than 3 times as old as Tony

∵ Tony is x years old

- Multiply the age of Tony by 3 and add 6 to the product

∴ The age of Mrs Martini = 3 x + 6

8 years ago

- Subtract 8 from the age of each one

Tony age = (x - 8)

Mrs Martini age = (3 x + 6) - 8 = 3 x + 6 - 8 = 3 x - 2

∵ Eight years ago, Mrs Martini was 2 years less than 9 times as old

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- Multiply Tony age by 9 and subtract 2 from the product

∵ Tony age from 8 years ago = x - 8

∵ Mrs Martini age from 8 years ago = 3 x - 2

∴ 9(x - 8) - 2 = 3 x - 2

- Simplify the left hand side

∴ 9 x - 72 - 2 = 3 x - 2

- Add like terms

∴ 9 x - 74 = 3 x - 2

- Subtract 3 x from both sides

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- Add 74 to both sides

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∵ x represents the age of Tony

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- Substitute x by 12

∵ 3(12) + 6 = 36 + 6 = 42

∴ Mrs Martini is 42 years old

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Learn more:

You can learn more about word problems in brainly.com/question/10557938

#LearnwithBrainly

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2 years ago
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Arte-miy333 [17]
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