Question

What is the measure of AB?

Answer 1

Hi
Welcome to openstudy :-)
Is there more info to this question?

Answer 2

Yes I'm so new to this I don't know how to post the whole problem. But it's a circle with 115° writing inside the circle

Answer 3

I see maybe @ParthKohli can help :-/

Answer 4

@pathkohli I need your help I'm doing Geometry 2 and some questions I need help on.

Answer 5

he is offline

maybe I and michale can help

Answer 6

If you could post the picture by saving it or using snipping tool on your computer that would be extremely helpful.

Answer 7

you can take a screenshot and use Attach File button or draw it

Answer 8

I think that we need to know the radius of the circumference

Answer 9

Yes something like that

Answer 10

according to the drawing of @AlexandervonHumboldt2 , we can write this:
\[AB = C \cdot \frac{{115}}{{360}}\]
where \(C\) is the length of such circumference

Answer 11

But the question ask what's the measure of AB?

Answer 12

in my formula above, \(AB\) represents the measure of the oriented arc from A to B

Answer 13

Do I need to be on a computer in order to draw and post the questions?

Answer 14

please post the complete text of the question

Answer 15

I need help on how to do that I'm new to this and working off a mobile phone @michele_Laino

Answer 16

please, you can make a screenshot of the text of the question, and then you can attach such screenshot using the "Attach FIle" blue button at the bottom of the post box

Answer 17

please use this button, in order to attach your files to post box:

Answer 18

I don't see anything that say attach file under mines it just say post @michele_laino

Answer 19

in that case, please try with your computer or notebook

Answer 20

Ok I have another question that ask, Find the circumference of a circle with radius of 4.5 to the nearest hundredth. @michele_laino

Answer 21

here we can apply this formula:
\[\Large C = 2\pi r \cong 2 \times 3.14 \times 4.5 = ...?\]

Answer 22

where \(C\) is the requested circumference

Answer 23

C= 28.26

Answer 24

better is \(C=28.27\) since we if we take \(\pi=3.14159\) we get \(C=28.27431\)

Answer 25

so, \(C=28.27\) is the right answer

Answer 26

A segment has end points (-9, -20) and (14, 12). What is the midpoint of this segment?

Answer 27

the coordinates of such midpoint \(M\), are:
\[\Large \begin{gathered}
{x_M} = \frac{{{x_1} + {x_2}}}{2} = \frac{{ - 9 + 14}}{2}=...?,\quad \hfill \\
\hfill \\
{y_M} = \frac{{{y_1} + {y_2}}}{2} = \frac{{ - 20 + 12}}{2}=...? \hfill \\
\end{gathered} \]

Answer 28

Xm= 5/2 , Ym= -8/2 ?

Answer 29

that's right! They are:
\[\Large \begin{gathered}
{x_M} = \frac{{{x_1} + {x_2}}}{2} = \frac{{ - 9 + 14}}{2} = \frac{5}{2}\quad \hfill \\
\hfill \\
{y_M} = \frac{{{y_1} + {y_2}}}{2} = \frac{{ - 20 + 12}}{2} = \frac{{ - 8}}{2} = - 4 \hfill \\
\end{gathered} \]

Answer 30

What is the distance between the points (-3, -10) and (4, 9)? Is this just like the same question we just did with the Y and X Midpoints?

Answer 31

the requested distance is given by the subsequent computation:
\[\Large \begin{gathered}
d = \sqrt {{{\left( { - 3 - 4} \right)}^2} + {{\left( { - 10 - 9} \right)}^2}} = \hfill \\
\hfill \\
= \sqrt {{7^2} + {{19}^2}} = ...? \hfill \\
\end{gathered} \]