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perimeter    音标拼音: [pɚ'ɪmətɚ]
n. 周长,周界

周长,周界

perimeter
n 1: the boundary line or the area immediately inside the
boundary [synonym: {margin}, {border}, {perimeter}]
2: a line enclosing a plane areas
3: the size of something as given by the distance around it
[synonym: {circumference}, {perimeter}]

Perimeter \Per*im"e*ter\, n. [Gr. ?; peri` around ? measure:
cf. F. p['e]rim[`e]tre.]
1. (Geom.) The outer boundary of a body or figure, or the sum
of all the sides.
[1913 Webster]

2. An instrument for determining the extent and shape of the
field of vision.
[1913 Webster] Perimetric


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  • Higher Math - Calculating the Minimum Perimeter of a Triangle
    No triangle exists that minimizes that condition However, the infinum of the perimeters of all such triangles = twice the distance from (a,b) to the line y = x That's just an application of the triangle inequality after picking the first two points (one is on the line, the other is (a,b)) of any triangle
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    An athletic track has four lanes The lanes are 1 metre apart If the inside lane is exactly 400 m, with 100m straights, find the lengths of the other three lanes Can I please have an explanation for obtaining the answer to this problem?
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    Show that the perimeter Pn of an n-sided regular polygon inscribed in a circle of radius r is P n = 2 n r sin (π n) Find the limit of Pn as n approaches ∞ My attempt: The sum of the interior angles is π (n 2) If we apply the cosine law to find the length of each side of the n-sided regular polygon we find c 2 = 2 r 2 2 r 2 cos (4 π n π)
  • Upper and Lower Bounds - Math Help Forum
    To granddad Really sorry if i am getting back to you on this For the first question perimeter of square , the data was the following: Upper bound perimeter=27 26cm Lower bound perimeter=27 22cm Give the perimeter of the square to an appropriate degree of accuracy As you said The true value of the perimeter lies between 27 22 cm and 27 26 cm
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    Use the figure to find the approximate perimeter of RSTU A) 72 5 in B) 73 6 in C) 72 0 in D) 73 0 in E) 71 8 in B you have to find the length of the sides first
  • Changing dimension in a rectangle - Math Help Forum
    so where do i start for this problem? the length l of a rectangle is decreasing at the rate of 2 cm sec while the width w is increasing at the rate of 2 cm sec when l=12cm and w= 5cm, find the rates of change of area, perimeter, and the lengths of the diagonals of the rectangle
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    The perimeter of an equilateral triangle exceeds the perimeter of a square by 1989cm The length of each side of the triangle exceeds the length of each side of the square by d cm The square has perimter greater than 0 How many positive integers are not possible values for d? t for side of
  • Surveying Property (Law of Sines) | Math Help Forum
    Then did the math, and since it asked for the perimeter I added all 3 sides after i used law of sines to find the sides Basically I got a really big answer, (the answer is 1425 ft) View attachment 23684 later found out about bearing and did this View attachment 23685 I tried to make sense of it, but the wording really confuses me Click to





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