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anonymous
 one year ago
so i got a question when it ask for the diameter of a circle and it gives me the radius do i put for example 7pi or just 7 and im confused with the whole circle/diamerter thing can someone explain please
anonymous
 one year ago
so i got a question when it ask for the diameter of a circle and it gives me the radius do i put for example 7pi or just 7 and im confused with the whole circle/diamerter thing can someone explain please

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butterflydreamer
 one year ago
Best ResponseYou've already chosen the best response.1Hint: Diameter = 2 * radius

butterflydreamer
 one year ago
Best ResponseYou've already chosen the best response.1dw:1441285319505:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0uhh im still lost for example like diameter is 7 wht is the circumference of a circle wht do i put

butterflydreamer
 one year ago
Best ResponseYou've already chosen the best response.1ahhhh okay! So do you know what the formula is to find the circumference of a circle? :)

butterflydreamer
 one year ago
Best ResponseYou've already chosen the best response.1\[circumference= 2 \pi r\] Where r = radius. Remember how i said diameter = 2 * radius? this means that d= 2r Therefore you want to find the value of "r" first :) r = 1/2 * d

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0like tht for example Suppose the circumference of a circle is 16π. What is its radius?

butterflydreamer
 one year ago
Best ResponseYou've already chosen the best response.1\[Circumference = 2 \pi r \] They've told us that the circumference of the circle equals to 16 pi and we want to find the radius right? \[Circumference = 16 \pi \] So this means that \[2 \pi r = 16 \pi\] Now just solve for "r" (radius)

butterflydreamer
 one year ago
Best ResponseYou've already chosen the best response.1close but not quite! \[2 \pi r = 16 \pi\] Divide both sides by 2 pi \[\frac{ 2 \pi r }{ 2 \pi} = \frac{ 16 \pi }{ 2 \pi}\] \[r = 8 \]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0o ok soo i got anotherone Suppose the circumference of a circle is 3π. What is its diameter?

butterflydreamer
 one year ago
Best ResponseYou've already chosen the best response.1follow the same pattern. Circumference of a circle formula: \[Circumference = 2 \pi r\] We are given the following information: \[circumference = 3 \pi\] \[\therefore 2 \pi r = 3 \pi\] Divide both sides by 2 pi to find "r". After you find "r", remember that d = 2r. Since we want to find diameter, multiply r by 2.

butterflydreamer
 one year ago
Best ResponseYou've already chosen the best response.1excellent!! :D

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0awesome thx and another one a diameter is 12 what is the radius

butterflydreamer
 one year ago
Best ResponseYou've already chosen the best response.1no worries :) remember this: DIAMETER = 2 TIMES RADIUS. RADIUS = 1/2 DIAMETER So if d = 2r And we're told d = 12 12 = 2r Solve for r
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