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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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  • Perimeter of a circle as a limit of inscribed regular sided polygon
    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)
  • perimeter - Math Help Forum
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  • Summing areas of squares | Math Help Forum
    A square S1 has a perimeter of 40 inches The vertices of a second square S2 are the midpoints of the sides of S1 The vertices of a third square S3 are the midpoints the sides of S2 Assume the process continues indefinitely, with the vertices of S K+1 being the midpoints of the sides of Sk
  • Perimeter - Math Help Forum
    How would I solve this? "The perimeter of a rectangle is 40 cm If the length were doubled and the width halved, the perimeter would be increased by 16cm Find the dimensions of the original rectangle "
  • SOLVED - Percentage increase in area of rectangle given increase in . . .
    One side of a rectangle is three times the other If the perimeter increases by 2%, what is the percentage increase in area? I've started with these few
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    How would I find the answer to A rectangular flat-screen computer monitor has a diagonal that measures 20 inches The ratio of the length of the screen to the width of the screen is 4 to 3 What is the perimeter of the screen, in inches?
  • Can perimeter be determined without assuming isosceles triangle?
    No, the perimeter cannot be determined without assuming the upper portion is an isosceles triangle Note: To give an answer for the area, you had to assume the lower section is a square There are no right angles labeled Diagrams need not be drawn to scale, for certain math problems, but if we were to take the 10 yards on the diagram as being closer to the truth, then the parts labeled 4 5
  • Perimeter of right triangle with inscribed circle
    Question: The radius of the inscribed circle is 5 If the length of the hypotenuse of the right triangle ABC is 19, what is the perimeter of the triangle?
  • finding the perimeter of a trapezoid with only bases and height given . . .
    b The bases are trapezoids with bases of lengths 7 and 9 perpendicular to one side of length 6; height = 12 this is due in 3hrs on my online exam ill apreciate any help my only problem is finding the perimeter of the trapezoid
  • Relationship between Area of Square and Rectangle - Math Help Forum
    The perimeter of the square has length 160 mm How much longer is the perimeter of the rectangle than the perimeter of the square? (b) Same question but this time the perimeter of the square is L mm and the long side of the rectangle is x times as long as the short side You are looking for the difference in perimeters, or P_ {r} - P_ {s}





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