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3 years ago

The circumference of my circle is 45 inches. What is the diameter

Mathematics

2 answers:

romanna [79]3 years ago

8 0

Answer:

14.32 inches to nearest thousandth.

Step-by-step explanation:

Circumference = π * d where d = the diameter.

So 45 = π * d

d = 45 / π

= 14.32 inches

mr_godi [17]3 years ago

4 0

Answer:

diameter ≈ 14.32 in ( 2 dec. places )

Step-by-step explanation:

the formula for calculating the circumference (C) of a circle is

C = πd ← d is the diameter

isolate d by dividing both sides by π

d = $\frac{C}{\pi }$ = $\frac{45}{\pi }$ ≈ 14.32

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xxMikexx [17]

Answer:

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Step-by-step explanation:

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2 years ago

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nordsb [41]

Answ

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3 years ago

How can I find the exact distance between the points(√7,-√2)and (4√7,5√2)

chubhunter [2.5K]

$\bf \textit{distance between 2 points}\\ \quad \\
\begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
% (a,b)
&({{ \sqrt{7}}}\quad ,&{{ -\sqrt{2}}})\quad 
% (c,d)
&({{4\sqrt{7}}}\quad ,&{{ 5\sqrt{2}}})
\end{array}~~~
% distance value
d = \sqrt{({{ x_2}}-{{ x_1}})^2 + ({{ y_2}}-{{ y_1}})^2}
\\\\\\
$

$\bf d=\sqrt{[4\sqrt{7}-\sqrt{7}]^2~+~[5\sqrt{2}-(-\sqrt{2})]^2}
\\\\\\
d=\sqrt{(4\sqrt{7}-\sqrt{7})^2~+~(5\sqrt{2}+\sqrt{2})^2}\implies d=\sqrt{(3\sqrt{7})^2~+~(6\sqrt{2})^2}
\\\\\\
d=\sqrt{3^2\cdot 7~~+~~6^2\cdot 2}\implies d=\sqrt{63+72}\implies d=\sqrt{135}
\\\\\\
\begin{cases}
135=5\cdot 3\cdot 3\cdot 3\\
\qquad 5\cdot 3^2\cdot 3\\
\qquad 15\cdot 3^2
\end{cases}\implies d=\sqrt{15\cdot 3^2}\implies d=3\sqrt{15}$

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3 years ago