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3 years ago

What is the length of a 45 arc

Mathematics

2 answers:

Andru [333]3 years ago

8 0

Answer:

1.5707

Step-by-step explanation:

i solved it using the furmola :

$2\pi \times r \frac{45}{360}$

boyakko [2]3 years ago

4 0

Answer:

Step-by-step explanation:

We know that the length of the arc in a circle is proportional to its corresponding angle which means:

a corresponds to 45

2πr corresponds to 360

then

$\frac{a}{45} = \frac{2\pi r}{360}$

then

a = (45÷360)×4×π

=1.570796326795

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n200080 [17]

The fence you have must fit the perimeter of the rectangle.

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1-ft x 17-ft . . . Area = 17 ft²

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6 0

3 years ago

Read 2 more answers

Solve step by step solution then only i can do it plxx

Anuta_ua [19.1K]

Answer:

<h3><u>Let's</u><u> </u><u>understand the concept</u><u>:</u><u>-</u></h3>

Here angle B is 90°

So $\triangle ABC$ and $\triangle ABD$ Are right angled triangle

So we use Pythagoras thereon for solution

<h3><u>Required Answer</u><u>:</u><u>-</u></h3>

First in triangle ABC

perpendicular=p=8cm

Hypontenuse =h =10cm

We need to find base=b

According to Pythagoras thereon

${\boxed{\sf b^2=h^2-p^2}}$

Substitutethe values

$\longrightarrow$ $\sf b^2=10^2-p^2$

$\longrightarrow$ $\sf b={\sqrt {10^2-8^2}}$

$\longrightarrow$ $\sf b={\sqrt{100-64}}$

$\longrightarrow$ $\bf b={\sqrt {36}}$

$\longrightarrow$ $\sf b=6$

$\therefore$ $\overline{BC}=6cm$

BD=BC+CD

$\longrightarrow$ $BD=9+6$

$\longrightarrow$ $BD=15cm$

Now in $\triangle ABD$

Perpendicular=p=8cm

Base =b=15cm

We need to find Hypontenuse =AD(x)

According to Pythagoras thereon

${\boxed {\sf h^2=p^2+b^2}}$

Substitute the values

$\longrightarrow$ $\sf h^2=8^2+15^2$

$\longrightarrow$ $\sf h={\sqrt {8^2+15^2}}$

$\longrightarrow$ $\sf h={\sqrt {64+225}}$

$\longrightarrow$ $\sf h={\sqrt {289}}$

$\longrightarrow$ $\sf h=17cm$

$\therefore$ ${\underline{\boxed{\bf x=17cm}}}$

3 0

3 years ago

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kobusy [5.1K]

73 feet per second

Steps-
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3 years ago

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kogti [31]

Answer:

84.6

Step-by-step explanation

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3 years ago

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Aleks04 [339]

Answer:

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Step-by-step explanation:

so the formula for area of a circle is πr^2

so the radius is 6, which we can just plug in

π(6)^2

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so option 3

5 0

3 years ago