find the perimiter of triangle DEF if triangle ABC~ triangle DEF?
483177
see u said  triangle ABC ~ triangle DEF\nthis means dat corresponding sides are proportional\n\ni.e.\n\nAB/DE : BC/EF : AC/DF \n\nREPLACING D VALUES V GET\n\n21/DE : 24/EF: 9/ 12\n\nNOW THS MEANS DAT \n21/DE = 9/ 12\nsolving v get \nDE = 28\n\nsimilarly it also means 24:EF = 9/12\nsolving v get EF = 32\n\ntherefore d perimeter of triangle DEF = 32 + 28 + 12  = 72
57318
9:3 simplifies to 3:1\n\ndivide both by 3 to get the answer
88953
=\na(x-y)+x(x-y)\n=(a+x)(x-y)\ndone
265237
3s = -6\ndivide each side by 3\ns = -2
538675
For Sine 105- Perpendicular/Hypotenuse\n\nFor Cosine 105- Base/Hypotenuse\n\nFor Tangent 105- Perpendicular/Base\n\n\n* Perpindicular, base and hypotenuse are the three sides of the triangle.
760269
"d" is the answer.\n\nGet an "A".
551883
The answer is C\nwell, one side's length of a triangle should be shorter than the other 2's plus (2 sides plus should be longer than one side)\nthen: 3x+4+8x+2>6x-1\n      8x+2+6x-1>3x-4\n      6x-1+3x+4>8x+2\n--> x>-7/5\n    x>3/11\n    x>-1\nThus, the answer should be x>3/11\n:)
465985
1 - D\n2 - B\n3 - C\n4 - C
343312
perimeter = 2 (side1 + side2)\narea = side1 * side2
310544
Distance formula=sq.root of{(x2-x1)sq.+(y2-y1)sq.}\n\nDistance AB=(from formula) sq.rt. of 89\nDistance BC=(from formula) 10\nDistance AC=(from formula) sq.rt. of 89\n\nFrom above-AB=AC.\nTwo sides are equal hence ABC is an isoceles triangle.
558731
distributive property;\n\na(b+c) = ab + ac
572270
triangle area = 1/2(height * width)\n\ncircle area = pi * radius^2
457089
G=uys\nF=***\nE=verthing
1136647
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!
985579
Here's my answer:\n\nhttp://mudandmuck.com/str2/triangles.JPG\n\nYou didn't say write them out in English, you said describe.  This picture describes the solution.
492690
S(I)+3f (g)--> SF (g)\n..........2...........6
219885
triangle- 3side\nquadrilateral- 4side\npentagon- 5side\nhexagon- 6side\nheptagon- 7side\noctagon- 8side\nnonagon- 9side\ndecagon- 10side\ndodecagon- 12side\nicosagon- 20side