What is the value of x?

47
33
28
56

Question

What is the value of x?
 	
	47
	33
	28
	56

anonymous · Answer

attachment

nincompoop · Answer

that's tough
very tough
what have you learned so far?

mathstudent55 · Answer

$c = \dfrac{a + b}{2} $
|dw:1437334141875:dw|

nincompoop · Answer

nice formula, but how did you get that? throwing formulas do not really give people intuitive ideas

mathmate · Answer

anonymous · Answer

@mathmate that actually did help, thank you !

nincompoop · Answer

that still doesn't answer how the formula came to be

mathmate · Answer

|dw:1437335336370:dw|
x=a/2+b/2=(a+b)/2   (exterior angles)
a/2 and b/2 follow from the central angle theorem.
@nincompoop

mathmate · Answer

@dani_00 
You're welcome!  :)

mathstudent55 · Answer

@dani_00 Did you get an answer?

anonymous · Answer

i got 28 but im not sure if its correct

anonymous · Answer

@mathstudent55

mathmate · Answer

@dani_00 
Look at the link I gave you, scroll to item #4, and apply the formula to find x.
Please tell me what you get.

anonymous · Answer

i got 47

anonymous · Answer

thank you @mathmate

mathmate · Answer

Correct!  
You're welcome!  :)

mathstudent55 · Answer

That is it!|dw:1437338232247:dw|