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What is the diameter & area of the radius of circle is 11cm 

          What is the diameter & area of the radius of circle is 11cm

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Geometry A Common Core Curriculum
Geometry A Common Core Curriculum
Ron Larson, Laurie Boswell 1st Edition
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What is the diameter & area of the radius of circle is 11cm
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Transcript

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00:03 Hey guys, so we have this problem here where we're given the diameter of a circle and we need to find the area.
00:11 So in order to do this problem, you need to know what the formula for an area of a circle is.
00:17 And it is pi r squared.
00:23 Pi is a constant.
00:24 R refers to the radius of the circle and you have to square it.
00:28 So how do we find the radius if we only know the diameter? well, the diameter is just diameter equals two times a radius.
00:38 So to find the radius, we just divide the two.
00:41 So the diameter divided by two equals the radius...
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