i will medal and fan
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Question

i will medal and fan
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maemae16 · Answer

attachment

maemae16 · Answer

first drop down menu

maemae16 · Answer

second drop down menu

maemae16 · Answer

@Jadeishere

jadeishere · Answer

I'm not the best person to ask about math and circles! So sorry
@agent0smith

maemae16 · Answer

its ok

maemae16 · Answer

i don't even have a clue on how to do this

agent0smith · Answer

How many degrees in a circle?

Find 7/10ths of that

periodicninja · Answer

why didnt you screenshot the whole screen?

maemae16 · Answer

i did but it had two drop down menus both of them wouldn't stay down while i was trying to take the screenshot

maemae16 · Answer

@agent0smith  $$360^o$$

agent0smith · Answer

Right, but:

How many degrees in a circle?

Find 7/10ths of that

maemae16 · Answer

how do i do that

agent0smith · Answer

'of' means multiply in "Find 7/10ths of that"

maemae16 · Answer

ok so its $$252^o$$

maemae16 · Answer

@agent0smith

mathstudent55 · Answer

Correct.
7/10 of 360 = 7/10 * 360 = 252

mathstudent55 · Answer

Your part 1 is correct.

mathstudent55 · Answer

A full circle is 360 deg. in angle measure.
How many radians of angle measure is a full circle?

maemae16 · Answer

idk i still haven't figured out the whole radians thing

maemae16 · Answer

@PeriodicNinja can you help me with the second part

mathstudent55 · Answer

Ok. I will explain.
Start with a circle with radius 1.

mathstudent55 · Answer

|dw:1467132593956:dw|

mathstudent55 · Answer

There you have a circle of radius 1.
Using the standard formula for the circumference of a circle, can you tell me what the exact circumference of the circle above is?

maemae16 · Answer

ummm this is something I've never been taught before

mathstudent55 · Answer

You have never learned the circumference of a circle?

maemae16 · Answer

i have but it was like 3 years ago and i haven't had to use it since i learned it

maemae16 · Answer

my question just timed out

mathstudent55 · Answer

The circumference of a circle is the length of the path along a full circle.
Its formula is

$\large C = 2 \pi r$

where $\pi$ is a Greek letter called "pi" (pronounced "pie" in English).
$\pi$ is an irrational number, a never-ending, never-repeating decimal approximately equal to 3.14.
and $r$ is the radius of the circle.

mathstudent55 · Answer

The circumference of a circle of radius 1 unit is $C = 2 \pi (1) = 2 \pi$

A radian is a unit of angle measure such that an angle of 1 radian produces an arc 1 unit long on the unit circle.
Since a full circle is an arc $2\pi$ units long on the unit circle, then a full circle has a radian measure of $2\pi$ radians.

mathstudent55 · Answer

Memorize this:
The angle measure for a full circle is:
360 degrees
$2\pi $ radians

mathstudent55 · Answer

Now your questions:

7/10 of a full circle is

$\dfrac{7}{10} \times 360 $ in degrees (which we already know is 252 degrees)

$\dfrac{7}{10} \times  2 \pi $ in radians

Now multiply (7/10) by $2\pi$