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Allisa [31]
3 years ago
14

5. If the tree's circumference is 141.3ft, what is its diameter?

Mathematics
2 answers:
BigorU [14]3 years ago
7 0

Answer:

d ≈ 45 ft

General Formulas and Concepts:

<u>Symbols</u>

  • π (pi) ≈ 3.14

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right  

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality<u> </u>

<u>Geometry</u>

  • Circumference of a Circle Formula: C = πd

Step-by-step explanation:

<u>Step 1: Define</u>

Circumference <em>C </em>= 141.3 ft

<u>Step 2: Solve for </u><em><u>d</u></em>

  1. Substitute in <em>C</em> [Circumference Formula]:                                                       141.3 ft = πd
  2. Substitute in π (approximation):                                                                      141.3 ft ≈ 3.14d
  3. [Division Property of Equality] Divide both sides by 3.14:                              45 ft ≈ d
  4. Rewrite:                                                                                                             d ≈ 45 ft
Ad libitum [116K]3 years ago
7 0
<h3>Diagram:</h3>

\setlength{\unitlength}{1mm}\begin{picture}(50,55)\linethickness{0.4mm}\qbezier(45,30)(45,30)(5,30)\qbezier(25.000,10.000)(33.284,10.000)(39.142,15.858)\qbezier(39.142,15.858)(45.000,21.716)(45.000,30.000)\qbezier(45.000,30.000)(45.000,38.284)(39.142,44.142)\qbezier(39.142,44.142)(33.284,50.000)(25.000,50.000)\qbezier(25.000,50.000)(16.716,50.000)(10.858,44.142)\qbezier(10.858,44.142)( 5.000,38.284)( 5.000,30.000)\qbezier( 5.000,30.000)( 5.000,21.716)(10.858,15.858)\qbezier(10.858,15.858)(16.716,10.000)(25.000,10.000)\multiput(5,30)(20,0){3}{\circle*{1}}\end{picture}

<h3>Given:</h3>

\\

↬ Circumference of circle = 141.4 ft

\\

<h3>To find:</h3>

\\

↬ diameter of circle

\\

<h3>Solution:</h3>

\\

To find diameter first we should know value of radius.

As:-

\boxed{\boxed{ \sf{}Radius =  \frac{diameter}{2}}}

\\

So first let's find value of radius.

\\

we know:-

\\

\bigstar \boxed{ \sf{Circumstances =2\pi r}}

\\

By using this formula we can find value of radius.

\\

\dashrightarrow\sf{Circumstances =2\pi r}

\\  \\

\dashrightarrow\sf{141.3 =2 \times  \dfrac{22}{7} \times  r}

\\  \\

\dashrightarrow\sf{ \dfrac{1413}{10}  =2 \times  \dfrac{22}{7} \times  r}

\\  \\

\dashrightarrow\sf{ \dfrac{1413}{10}   \times  \dfrac{7}{22} \times  \dfrac{1}{2}  =r}

\\  \\

\dashrightarrow\sf{ \dfrac{1413 \times 7}{10 \times 22 \times 2}=r}

\\  \\

\dashrightarrow\sf{ \dfrac{9891}{10 \times 22 \times 2}=r}

\\  \\

\dashrightarrow\sf{ \dfrac{9891}{440}=r}

\\  \\

\dashrightarrow\sf{ r = \dfrac{9891}{440}}

\\  \\

\dashrightarrow\sf{ r =22.48~inches} \textsf{ \textbf{(approx)}}

\\

Now let find diameter:

As we know:

\boxed{\boxed{ \sf{}Radius =  \frac{diameter}{2}}}

Therefore:

:  \implies{}\sf{}Radius =  \dfrac{diameter}{2}

\\  \\

:  \implies{}\sf{}22.48 =  \dfrac{diameter}{2}

\\  \\

:  \implies{}\sf{} \dfrac{diameter}{2} = 22.48

\\  \\

:  \implies{}\sf{} diamete r= 22.48 \times 2

\\  \\

:  \implies{}\sf{} diamete r= 44.96 ~inches

\\  \\

\therefore\underline\textsf{diameter of tree is \textbf{45 inches (approx)}}

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