Yahoo Answers: Answers and Comments for Perimeter and Area of Composite Figures > help? [Mathematics]
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From Anonymous
enUS
Fri, 02 Jan 2009 19:06:42 +0000
3
Yahoo Answers: Answers and Comments for Perimeter and Area of Composite Figures > help? [Mathematics]
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https://answers.yahoo.com/question/index?qid=20090102190642AAGQbNV
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From lorrie: Let L = length; w=width Perimeter = 2L + 2w = ...
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https://answers.yahoo.com/question/index?qid=20090102190642AAGQbNV
Mon, 23 May 2016 17:14:39 +0000
Let L = length; w=width Perimeter = 2L + 2w = 44 Or L + W = 22 (dividing perimeter by 2) Let W = 22  L Substituting for W and L in the area function (L)(22  L) = 40 22 L  L^2 = 40 Rewrite into standard quadratic form L^2  22L + 40 = 0 Factoring by using FOIL method (L  20)(L  2) = 0 So, L = 20 or 2 If L = 20, W = 22  L = 2 So, W = 2, L = 20 If we tried L = 2 W = 22  L W = 2 So W = 20; L = 2 By convention, the longer side is denoted by L so L = 20, W = 2 Either way, the dimensions of rectangle are 2 yards x 20 yards

From Jerome J: Inner radius of outer ring = 8 + 3(8) = 32 cm
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https://answers.yahoo.com/question/index?qid=20090102190642AAGQbNV
Fri, 02 Jan 2009 19:28:55 +0000
Inner radius of outer ring = 8 + 3(8) = 32 cm
outer radius of outer ring = 8 + 4(8) = 40 cm
a) Area of outer ring = π(40)²  π(32)² = 576π = 1809.56 cm²
b) Percent of total area = [π(40)²  π(32)²] / π(40)² = 0.36 = 36 %

From macdinvest: Area = pi r^2
Whole circle is 3.14 40 40
5...
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https://answers.yahoo.com/question/index?qid=20090102190642AAGQbNV
Fri, 02 Jan 2009 19:28:22 +0000
Area = pi r^2
Whole circle is 3.14 40 40
5024 sq cm
Area of inner circles 3.14 32 32
3215.36
5024 total minus
3215.36 inner
1808.64
I say 1809 sq cm in the outside
1809/5024= 0.36 or 36 percent

From Davis P: center r = 8
ring 1 r = 16
ring 2 r = 24
r...
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https://answers.yahoo.com/question/index?qid=20090102190642AAGQbNV
Fri, 02 Jan 2009 19:23:47 +0000
center r = 8
ring 1 r = 16
ring 2 r = 24
ring 3 r = 32
ring 4 r = 40
area ring 4 = pi 40^2  pi 32^2 = pi(1600  1024) = 576 pi = 1810 sq cm
% of total area = 576pi/ 1600 pi = 576 /1600 * 100 = 36 %

From loud_mouth_lime: the target has an area of pi (40 cm)^2 = 5026....
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https://answers.yahoo.com/question/index?qid=20090102190642AAGQbNV
Fri, 02 Jan 2009 19:23:02 +0000
the target has an area of pi (40 cm)^2 = 5026.548246, the radii are at 8 cm, 16 cm, 24 cm, and 32 cm. The area inside the last ring is pi (40 cm)^2  pi (32 cm)^2 = 1809.5574. The ratio of this area to the entire target area is 0.36, or 36%.