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  1. Finding a rule, domain and area. | Math Help Forum

    Feb 12, 2011 · The dimensions of an enclosure are shown. The perimeter of the enclosure is 160m. a) Find a rule for the area, A m^2, of the enclosure in terms of x. b) State a suitable domain of the …

  2. Perimeter of a circle as a limit of inscribed regular sided polygon

    Sep 9, 2024 · 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 …

  3. Higher Math - Calculating the Minimum Perimeter of a Triangle

    Oct 12, 2012 · 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 …

  4. Divide a square into 7 equal parts - Math Help Forum

    Dec 7, 2007 · Can you help me devide a square into seven equal parts? Each having the same amount of perimeter and the same area? It seems like everything I do I just end up with 8 peices. Is this not …

  5. Use the figure to find the approximate perimeter of RSTU.?

    Sep 6, 2009 · 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 ...

  6. Optimization problem - Math Help Forum

    Dec 1, 2011 · This problem is giving me some trouble. It's irritating because it seems so easy. The question is "The figures are made of rectangles and semicircles. a.) Find a formula for the area b.) …

  7. Perimeter of Triangle - Math Help Forum

    Sep 10, 2008 · Given a point (a,b) with 0 < b < a, determine the minimum perimeter of a triangle with one vertex at (a,b), one on the x-axis, and one on the line y=x. Thanks!

  8. Perimeter of a rectangle. - Math Help Forum

    May 29, 2010 · 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 …

  9. perimeter - Math Help Forum

    Nov 1, 2009 · Two unequal circles (radius x and y, x > y) are touching each other. A rubber band is passed around both of them. What would be the length of the rubber band?

  10. Changing dimension in a rectangle - Math Help Forum

    Oct 16, 2006 · 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 …