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  1. Summing areas of squares | Math Help Forum

    2008年4月14日 · 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 …

  2. Rectangular Package | Math Help Forum

    2010年10月4日 · A Rectangular package sent by a delivery can have a maximum combined length and girth (perimeter of a cross section) of 120 inches. Here, there is a picture, which is …

  3. Perimeter - Math Help Forum

    2008年10月5日 · 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 …

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

    2007年12月7日 · 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 …

  5. Cubic Function of a Cylinder - Math Help Forum

    2009年10月4日 · A rectangular piece of sheet metal with perimeter 50cm is rolled into a cylinder with open ends. a) Express the volume of the cylinder as a function of x. Then give the domain …

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

    2024年9月9日 · 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 …

  7. SOLVED - Percentage increase in area of rectangle given increase …

    2010年8月29日 · 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...

  8. find the the dimensions of x and y | Math Help Forum

    2009年12月3日 · a. Find a formula for the area b. find a formula for the perimeter c. find the dimensions x and y that maximize the area given that the perimeter is 100 . * See attachment …

  9. Maximizing Area & Differentials - Math Help Forum

    2007年12月16日 · A window consists of an open rectangle topped by a semicircle and is to have a perimeter of 288 inches. Find the radius of the semicircle that will maximize the area of the …

  10. Changing dimension in a rectangle - Math Help Forum

    2006年10月16日 · 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 …