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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
pre-calculus - Math Help Forum Hello all! I am having a problem understanding something in my Pre-calculus class I have always had trouble with math, so bear with me here ;) Here are a couple of example problems Lee is running around the perimeter of a circular track at a rate of 10 ft sec The track has a radius of 100
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)
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
Optimization problem - Math Help Forum 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 ) Find a formula for the perimeter c ) Find the dimensions x and y that maximize the area given that
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
Need Quadratic Equation - Math Help Forum It will be rectangular with dimensions by 9 m by 6m The flower bed will be surrounded by a path of constant width with the same area as the flower bed Calculate the perimeter of the path " Diagram attatched A) Set up a quadratic Equation To model the problem BTW, Grade 10 Math Click to expand