What is an isosceles and a scalene triangle?
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An isosceles triangle is a triangle with two equal sides. A scalene doesn't have any equal sides.
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ALWAYS ... \n\nTo qualify as an isosceles, you must have two sides equal.\nTo qualify as an equilateral, you must have three sides equal.\n\nJust because you have more than what you need, doesn't mean you aren't that too.
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Here's the process you would use to solve the problem.\n\nFirst, you need to know that an isosceles triangle has two equal sides.\n\nTherefore, you have two variables in the problem\n                    x = length of leg (there are two of these)\n                    y = length of base\n\nWe know that "the length of one of the equal lengths of an isosceles triangle is 8 cm les than 4 times the length of the base."  Therefore, we can write "x" in terms of "y":\n\n                    x = 4y - 8\n\nFurthermore, we know that the perimeter is 29 cm.  Now we can set up an algebraic expression to solve for "x."\n\n2x + y = 29   (initial equation)\n2(4y-8) + y = 29 (substitution)\ny = 5 (solved)\n\nWe have the length of the base ("y").  Now we can solve for the length of one of the equal legs.  Remember from above that\n\nx = 4y - 8\nx = 4(5) - 8\nx = 12\n\nSolved!\n\nIf you are still confused, draw an isosceles triangle to visualize the problem.  Label the base "y" and the two legs "x."
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A triangle in which all 3 sides are of different lenghts, with different angles.
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OK.. First of all it's an isosceles triangle.. thus the base is divided by the vertical line into two equal halves of 3 and 3 each.. \nNow just look at one triangle.. say the left one.. it is a right traingle (the vertical line is perpendicular to the base) having base of 3 and hypotenuse of 21. \nThus if the vertical height is 'h'     => h^2 + 3^2 = 21^2   (^2 means square.. ie power 2) \nsolving for h = (441 -9)^(1/2) = 20.78  (use a calculator)\nNow for theta..         Cos a = Base / hypotenuse \n                                 cos a = 3/21 = 1/7\n                                 a= cos^-1 (1/7)          (Cosine inverse)\n                                 a = 1.43 radians         (Use a calculator :-) )\nGuess thats it !!
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an isoceles triangle pointing up\nand another pointing down right on top of it
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There are three cases:\n1) Side-Side-Side (SSS)\n2) Side-Angle-Side (SAS)\n3) Angle-Side-Angle (ASA)\nNote that Angle-Angle-Angle (AAA) does not guarantee two triangles are equal (congruent).  It does guarantee that they are similar.\nAlso, Angle-Angle-Side (AAS) does not mean the triangles are congruent.
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Ahh, a triangle. Since you know the two long sides of the triangle and the angle between them, use the Lore of Co-signs to get the third side (Law of Cosines).
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It's been too long for me.\n\nSample many definitions. Go to MATHWORLD.COM (lower case)\n2 geometric figures are CONGRUENT when one gets transformed into the other by isometry.\n\nStay with it.\n\nGRIZZ
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If a rhombus is inscribed in a circle, then the rhombus is a square.  (Remember that a square is a rectangle with congruent sides, or a rhombus with congruent angles.)\n\nIf a trapezoid is inscribed in a circle, then the trapezoid is an isosceles trapezoid.
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What type of triangle is it?\nIf it is an equilateral triangle, all sides will be the same length, so p=(1.25 X 3)m\n\nHope this helps
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Triangles can be classified in two ways:\n\nBy the relative lengths of their sides:\n\n1.  Equilateral:  all sides are of equal length\n2.  Isosceles:  at least two sides are equal\n3.  Scalene:  all sides have different lengths \n   \nBy the size of their largest internal angle:\n\n1.  Right:  has one 90°internal angle\n2.  Obtuse:  has one internal angle larger than 90° \n3.  Acute:  all internal angles are smaller than 90°
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1) Do you mean equilateral or scalene?  You can only answer this if it is a regular, equilateral (all sides the same).\n\nLet S be the length of one side.  Then the perimeter is given by the formula\nPerimeter = 3S = 74 cm.\n3S = 74\n\nDivide both sides by 3:\nS = 74/3\nS = 24 2/3 cm\n\nEach side of the equilaterlal triangle is 24 2/3 cm.\n\n2) The perimeter of a rectangle is 2(W + L) = 48 cm\nYou are also told that the width is 1/3 the length.  In other words:\n3W = L\nPerimeter = 2(W + 3W)\nPerimeter = 2(4W)\n48 = 8W\nW = 6 cm\nL = 3W = 3(6) = 18 cm.\n\nSo the width is 6 cm, the length is 18 cm.\n\n3) A regular hexagon has six sides that are all the same.\nThe formula for the perimeter is 6S = 96 cm.\n6S = 96\n\nDivide both sides by 6:\nS = 96 / 6\nS = 12 cm\n\nSo each side of the regular hexagon is 12 cm.
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just draw a triangle has right angle which dimensions 1,sqrt(3),and hypothenus 2. if you want it, i can send to you
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like .-1 said\n\nthat would make it, for example, the ratio of lengths of hypotenuse to either leg of an isoceles right triangle.\n\nor the ratio of the length of a diagonal of a square to the length of any of its sides.\n\nalso the factor to scale a plane figure in order to double its area\n\netc.
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I think so, actually...\n\n1. Draw 2 perp. lines.\n2. Draw 2 hypotenuses to each base such that the triangles made are 45-45-90 triangles (extend the bases as well, if you need to).\n3.  You have just made an isoceles triangle since the base angles are congruent.\n4.  The line that is perp. to the base is now the perpendicular bisector because the triangle is isoceles.\n\nViola!
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Since the triangle is Isoceles, if you split the triangle down the middle you can turn in into a right triangle. You can use the Pythagorean theorem. (a^2 + b^2 = c^2.)\n\n13 will be the hypotenuse and 5 will be the base. To find the altitude you just fill everything in. \n\n5^2 + b^2= 13^2\n25 + b^2 = 169\nb^2 = 144\nb = 12