Or you can think of the stool as square with 4 legs, same answer results.  Can anything ever be measured exactly?
214770
100 N divided by four is 25 newtons.\nHowever if one of the legs is shorter and there are only 3 legs, the stool will probably fall over.\nNothing can be ever measured accurately.. Check out Schroedingers Cat.
540355
answer four does not appear to be correct
31945
A square foot is an actual square measuring 12 inches in length on each of it's four sides.
536612
Hi babygurl, \nAll you have to remember is that the exterior angle measures ALWAYS add up to 360 degrees, no matter how many there are.  So just divide 360 by the number of sides to get the measure of any one exterior angle (assuming it's a regular polygon so all the angles are the same).\n 360/4=90.
77175
No way to know.  What is the shape of "everything"?  I think it is round and that if you go to one end, you'll end up back at the same point if you keep going the same direction.\n\nGood question.
207545
Your question is unclear about what set of assumptions you want to use. You seem to imply a perfectly constructed stool, with a perfectly centered force, using incompressible material. You want the stool to have no mass, and you imply that you want to use statics to solve this problem. Strictly applying statics, this system is indeterminate, NOT the ridiculous answer of 0 [N] in two legs and W/2 [N] in the others. There are only 3 equations of equilibrium here, 1 for vertical forces and 2 for moments. Since you have four legs, this system cannot be solved by statics alone. Treating the stool as a deformable structure, you can use geometric compatibility to get a fourth equation. I challenge you to find a competently built stool that has 0 [N] in any leg (a physical stool built of real materials), or an incompetently built stool with 0 [N] in any two legs (unstable system that is obviously not static). The answer indicated as "correct" requires an incorrect application of statics. A large part of studying physics is learning when to use a particular tool, and the physical limits of that tool.\n\nedit: \nI am perfectly aware of what a zero force member is, and there are no zero force members here. You can only find zero force by statics if the structure is determinate, which is not true in this case.\n\nI completely agree with the PowerPoint presentation (definitely not a proof BTW). "But if one leg does not touch the floor, the force in it is zero. If one leg is zero, then the opposite leg is also zero by moment equilibrium. The two remaining legs carry all of the load = 90 pounds/leg. All four legs must be designed to carry the 90 pounds (since any two legs could be loaded)." only applies if the premise is satisfied, namely "if one leg does not touch the floor". I assure you, the normal idea of a four-legged stool requires all four legs to touch. Notice they finish off the calculation using a 45 lb/leg design load, not 90 lb/leg.\n\nI did not call you ridiculous; I rarely resort to name-calling. Please use the built-in spell checker.
306101
Okay, I got something really different, but it might be wrong, I used tangents and stuff to figure it out, and I assumed a dodecagon had 12 sides, but I might be wrong. Anyways, I got 38.4 for the perimeter, and 115.2 for the area.
311072
4 X 4 =16 square inches.......
14470
Let No of square is N\nPerimeter = 2xN + 2 \n\nAssumptions:\nThey are arranged in a row.\nThey are of same size.\nThey are of UNIT size.
540423
Is it isosceles (with the legs the same length)?\n\nThen you can solve using:\na² + b² = c²\n\nc² = sqrt(52)² = 52\n\nThus a² + b² = 52\n\nIf a = b, then a² = 26\na = b = sqrt(26)\n\nOtherwise, if you don't have some other information, you can't uniquely solve for the length of the legs.  The legs could have lengths from nearly 0 to nearly sqrt(52).
398703
If your two figures have a ratio of similarity of 2:5, then each side of the smaller one is the side of the larger one times 2 and divided by 5.  This might lead you to believe that your area would be 100 times 2 and divided by 5 = 40.  This is, however, not the case.  If each side is times 2 and divided by 5, the total area is times 2 times 2 divided by 5 divided by 5. = 16\nThe best way to imagine this problem is by assuming your shape is a square.  How large is each side of the square if the area is 100 square units?  Each side must be 10 units, since 10 times 10 is 100 square units.  Now shrink each side by multiplying by 2 and dividing by 5.  Each side is now 4 units long.  How much area is your square?  4 times 4 is 16 square units!
460083
Hmm.. good question. I would presume so, because it's basically the same thing and length.
282380
To find area you multiply the length times the width. It's pretty easy once you know
16533
Physics, major science dealing with the fundamental constituents of the universe, the forces they exert on one another, and the effects of these forces. \n\nMeasurement, finding the size or amount of some quantity, and expressing it as a number of defined units.All measurement is based on a comparison. In general, the thing to be measured is compared with something that has already been calibrated, or measured against a known reference. However, a measurement is not complete unless it includes a statement of its uncertainty, or the confidence one can have in it.\nUnits of Weight and Measurement\nImperial System\nAMOUNT NAME \nAngular or Circular Measure \n60 seconds = 1 minute (min) \n60 minutes = 1 degree \n30 degrees = 1 zodiac sign \n57.2958 degrees = 1 radian \n90 degrees = 1 quadrant or right angle \n360 degrees = 1 circle \nCubic Measure (Volume) \n1,728 cubic inches (cu in) = 1 cubic foot (cu ft) \n27 cubic feet = 1 cubic yard (cu yd) \n231 cubic inches = 1 US gallon (gal) \n277.27 cubic inches = 1 British imperial gallon (i gal) \n2,150.42 cubic inches = 1 US bushel (bu) \n2,219.36 cubic inches = 1 British imperial bushel (i bu) \nDry Measure (Capacity) \n2 pints = 1 quart \n8 quarts = 1 peck (pk) \n4 pecks = 1 bushel \nLinear Measure (Length) \n1,000 mils = 1 inch (in) \n12 inches = 1 foot (ft) \n3 feet = 1 yard (yd) \n5.5 yards = 1 rod (rd) \n40 rods = 1 furlong (fur) \n8 furlongs = 1 mile (mi) \n5,280 feet = 1 mile \n3 miles = 1 league (l) \nLiquid Measure (Capacity) \n4 fluid ounces (fl oz) = 1 gill (gi) \n4 gills = 1 pint (pt) \n2 pints = 1 quart (qt) \n4 quarts = 1 gallon (gal) \nMariners’ Measure \n6 feet = 1 fathom (fath) \n120 fathoms = 1 cable’s length (US Navy) \n1,852 metres = 1 nautical mile (n mi) \n1 nautical mile per hour (n mph) = 1 knot (k) \nPaper Measure \n25 sheets = 1 quire (qr) \n20 quires = 1 standard ream (rm) \n516 sheets = 1 printers’ ream \n2 reams = 1 bundle (bdl) \n4 bundles = 1 case (c) \nPrinters’ Measure (Typography) \n0.013837 inches = 1 point \n12 points = 1 pica \nSquare Measure (Area) \n144 square inches (sq in) = 1 square foot (sq ft) \n9 square feet = 1 square yard (sq yd) \n30.25 square yards = 1 square rod (sq rd) \n160 square rods = 1 acre \n640 acres = 1 square mile (sq mi) \nSurveyors’ Measure \n7.92 inches = 1 link (li) \n66 feet = 1 chain \n80 chains = 1 mile \nWood Measure \n144 cubic inches (1' x 1' x 1'') = 1 board foot (bd ft) \n16 cubic feet (4' x 4' x 1') = 1 cord foot (cd ft) \n8 cord feet = 1 cord (cd) \nWEIGHTS \nWeight (Apothecaries’) \n20 grains = 1 scruple (s ap) \n3 scruples = 1 dram (dr ap) \n8 drams = 1 ounce (oz ap) \n12 ounces = 1 pound (lb ap) \nWeight (Avoirdupois) \n27.3438 grains = 1 dram (dr) \n16 drams = 1 ounce (oz) \n16 ounces = 1 pound (lb) \n14 pounds = 1 stone \n100 pounds = 1 hundredweight (cwt) \n8 stones = 1 long hundredweight \n(l cwt) \n2,000 pounds = 1 short ton (ST) \n2,240 pounds = 1 long ton (LT) or 20 (l cwt) \nWeight (Troy) \n24 grains = 1 pennyweight (dwt) \n20 pennyweights = 1 ounce (oz t) \n12 ounces = 1 pound (lb t) \n\nMiscellaneous Units\nWEIGHT/MEASURE UNITS \nAbsolute zero = -273.15o C (-459.67o F) \n1 atmosphere = 760 mm of mercury \n1 cup = 10 fluid ounces \n1 carat (international) = 200 milligrams (gem weight) \n1 megaton = 1,000,000 tons \n3 teaspoons = 1 tablespoon \n1 angstrom unit = 0.1 nanometre \n1 bolt of cloth = 40 yards \n1 gross = 12 dozen, or 144 \n1 light-year = 9.46 x 1012 km \n(5.88 x 1012 mi) \n1 tablespoon = 1/2 fluid ounce
55579
If it's only the front, and assuming it's rectangular, it's 30 x 30 =900. If it is not rectangular, information is not sufficient to tell.
323445
yup your answers are correct.\n\nhowever your units are not, length and width are measured in yards not sq yards.
542392
just clarifying first answer... \n\nlet   a = 1st leg\nand b = 2nd leg\n       c = hypotenuse\n\na= 2 + 2b -->> one leg(a) is two inches(2+) more than twice the other leg(2b)\n\nsubstitute a\n[(2+2b)^2] + [b^2] = [13^2]\n[4+4b+(4b^2)] + [b^2} = 169\n5b^2 + 8b + 4-169 = 0\n5b^2 + 8b - 165 = 0\n  A         B     C\nusing quadratic formula which is -B plus or minus the square root of B^2 - 4AC all over 2A\n\n-8 plus/minus squareroot of 64 - [4(5)(-165)] all over 2x5\n\n-8 plus/minus squareroot of 58 all over 10\n\n[-8 + 58] / 10 = 5\n\nor \n\n[-8-58] /10 = -6.6\n\nnegative sides do not exist so one side (b) is 5\n\ngoing back to a= 2 + 2b \na = 2+10\na = 12\n\ntherefore\na = 12,\nb = 5\nc = 13