1. W

    Help Finding Perimeter of Rectangle

    Hello, I am studying to take a math placement exam in two days. There's this one geometry problem that I cannot figure out how to solve. I watched a video of someone solving it but I don't understand what they're doing after a certain point. Here's the problem: I don't know if it's just me...
  2. math951

    Perimeter of sector and area of sector

    I am doing A=1/2r^2(thetta) <---- for calculation of the area of a sector as mentioned in the textbook the r= 5in A=1/2(5^2)(pi/6)= 1/2(25pi/6)in^2 However, this answer is wrong the answer they have is : perimiter is : (10+5pi/6)= 12.62 in and area is 25pi/12in^2= 6.54in^2 EDIT: I found...
  3. C

    Rectangle Perimeter (w/ Complex Number & Abs Value?)

    [Solved] Rectangle Perimeter (w/ Complex Number & Abs Value?) Imagine a rectangle ABCD (A in the bottom-left, continuing counter-clockwise to D in the upper-left) with AB = 25 and BC = k. Let i = √-1. If | 45 + ki | = 53, find the perimeter. I keep getting ki = 8 and ki = -98 by trying to solve...
  4. S

    perimeter of a triangle word problem

    In a right triangle, the hypotenuse is 1 foot more than the long leg, while the short leg is 11ft. less than half the length of the long leg. Your goal: find the perimeter of this triangle. I know i'm going to have to use a^2 + b^2 = c^2. First I labeled each side. We don't know the long leg...
  5. C

    Perimeter or Area

    You make a window out of a rectangular pane of glass by surrounding it with a wooden frame that is 5 inches wide. The pane of glass is 20 inches long and 24 inches wide. How much of wooden frame you wood need? (I'm not sure if your looking for the area or perimeter)
  6. G

    Maximum perimeter of n-sided polygon

    In the picture below i have worked out the maximum perimeter for a n-sided polygon inscribed in a circle. The marker for the project said all the working out was proper until i applied the limit. Can someone show me how to write the last part out properly. If someone could show me the proper...
  7. O

    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?
  8. G

    area and perimeter of convex polygon in a cricle

    I want to find the maximum area and perimeter of a n-sided convex polygon in the circle. I have derived Perimeter(n)=2nRsin(pi/n) Area(n)=nR^2sin(pi/n)cos(pi/n) As n can approach infinity i imagine it would replicate the borders of the circle. Is there a way to solve this problem using...
  9. G


    I need help on a real easy question I just want to make sure I am doing it properly......The question is A polygon is divided into 8 congruent squares. THe area of the polygon is 72 square feet . Find the perimeter.
  10. M

    Perimeter and area of the circle

    How to prove that a circle has the maximum possible area for a given perimeter, and the minimum possible perimeter for a given area.
  11. J

    Finding the Centre Coordinate of A Circle Given 3 Coordinates Along Its Perimeter

    I am having a tough time coming up with a solution. The circle's radius is 400. Coordinate 1 is (55.7982 , -99.3496) Coordinate 2 is (45.4124 , -89.1756) and Coordinate 3 is (57.3059 , -82.9315) With this information, is it possible to determine the centre co-ordinate of this circle? What is...
  12. L

    Find Perimeter of a Right Traingle w/ Hypotenuse & Area

    Hi everyone! I've been struggling with this problem recently, and don't really understand how I'm supposed to solve it: A hypotenuse of a right triangle has length 8. The area of the triangle is also 8 units squared. What is the perimeter of the triangle? Any help would be appreciated!
  13. T

    Calculate perimeter of shaded area

    Hello guys need some help solving this problem MA=MC=4 ; M and O are centers.
  14. R

    Perimeter of an ellipse from radii, and vice-versa

    Hi there, I'm new here. Greetings. I just posted this in the pre-Calculus forum but realize I should put it here, so.... I need to figure out how to calculate the perimeter, or circumference, of an ellipse using the radii, and vice-versa: how to figure out the radii given the perimeter and...
  15. R

    Perimeter of an ellipse from radii, and vice-versa

    Hi there, I'm new here. Greetings. I need to figure out how to calculate the perimeter, or circumference, of an ellipse using the radii, and vice-versa: how to figure out the radii given the perimeter and the ratio of the two radii to each other. I found an equation for the perimeter, or...
  16. C

    Any help with this perimeter question would be great thanks!

    I'm a little unsure how to write this. Thanks
  17. C

    Please help me on this Perimeter as a function of x question.

    Is P(x)= + 3x + 3x +, even close? Any input would be great. Thanks a lot!
  18. S

    Perimeter and area (Images included)

    Hi guys, I received the following task, And I was suppose to determine the amount of tiles, of 200m by 200m, are needed to cover the space. I pulled this from the memo, because I don't quite understand the question itself with the steps that were done. Could someone please break it down for me...
  19. S

    Finding the perimeter and area of the shaded portion

    Hi, I was wondering if I could get some help with this problem... After doing the area I got 9.78" and I don't know how to do the perimeter. If someone could go over this with me, that would be great!