length is 10 perimeter is 24 what is the width and area?
回答 (13)
✔ 最佳答案
2(10) + 2W = 24
20 + 2W = 24
2W = 4
W = 2
A = WL = 2(10) = 20
here is an example
the perimeter of a rectangle is 30in and the length is 8in find the width
30 = 2L + 2W
30 = 2(8) + 2W
30 = 16 + 2W
14 = 2W
7 = W
Width is 7in
length*width=area
perimeter = 2(length+width)
plug in for 24= 2(10+width)
goes to 2width=4 so width = 2
and plug into area equation so 2*10 = area = 20
perimeter = 2length + 2width.
24= 2(10) + 2w
w= 2
area = length*width
area= 10(2) = 20
P = 2L + 2W
24 = 2 (10) + 2 W
A = L x W
good luck
2L + 2W = 24
You know L = 10 so
2(10) + 2w = 24
20 + 2w = 24
Subtract 20 from each side
2w = 4
w = 2
so length is 10 and width is 2 and area is length times width so area is 20
I'm assuming this is a rectangle? If so...
Width=2
per = 24
length + width = 12
length = 10
width = 2
area = 20
width: 2
area: 20 square units
To find the width, divide the perimeter by 2 (because there are TWO of each side length) and subtract 10. This gives you 2.
To find the area, simply multiply length by width: 10 x 2. This gives you 20.
Remember to include units, and that area is in units squared!
收錄日期: 2021-05-01 00:00:16
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090914172907AAwOppQ
檢視 Wayback Machine 備份