3 years ago

What is the perimeter of the rectangle

Mathematics

1 answer:

timofeeve [1]3 years ago

7 0

Answer:

A = 22in

Step-by-step explanation:

P = 2L + 2W P = 2(6) + 2(5) A = 30

A = L * W P = 12 + 10 L = 6

30 = 6W P = 22 W = 5

W=5

A = Area of the rectangle is 30in

P = Perimeter of the rectangle is 22in

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What is the total surface area

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$A_T=\dfrac{1}{2}l_1l_2$

l₁, l₂ - legs

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$A_T=\dfrac{1}{2}(20)(21)=(10)(21)=210\ cm^2$

The formula of an area of a rectangle:

$A_R=lw$

l - length

w - width

We have:

rectangle #1: l = 22cm, w = 29cm

$A_{R1}=(22)(29)=638\ cm^2$

rectangle #2: l = 22cm, w = 21cm

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rectangle #3: l = 22cm, w = 20cm

$A_{R3}=(22)(20)=440\ cm^2$

The total Surface Area of the triangular prism:

$S.A.=2A_T+A_{R1}+A_{R2}+A_{R3}\\\\S.A.=2\cdot210+638+462+440=1960\ cm^2$

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A certain number was divided by 3 and 3 was added to the result. The final answer was 8 what was the number

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Answer:

Step-by-step explanation:

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