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2008-07-05 Geometry - proving a triangle is isoceles: Hello John, ([justifications will be bracketed] "=" means congruent) In triangle AGC: m<BGE=m<DGE [given] AC is perpendicular to GF [given] m<AFG=m<CFG=90 [definition of "perpendicular"]...
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2008-07-03 Geometry - Perimeter - Rectangular Prism: Hi Dace, Three-dimensional figures don't really have a "perimeter," but two-dimensional figures do. Do you mean the perimeter of base of the prism? That would make more sense. For the rectangular...
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2008-07-03 Geometry - Volume - Cylinder: Hello Anmol! I would begin by making the base of the cylinder, whose circular area would be calculated by πr^2. Make a bunch of other circular discs congruent to your base. Their combined area...
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2008-07-02 Algebra - Algebra: X = # of Nickels and Y = # of Dimes (Equation 1) X + Y = 18 (Equation 2) X*.05 + Y*.1 = 1.50 Equation 1, solve for X X = 18-Y Plug this into equation 2 (18-Y)*.05 + Y*.1 = 1.50 .9...
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2008-07-02 Word Problems - problem solving: Clearly, the area of the first square is 1^1 ==> A1=1 The second square has sides sqrt(2)/2, so its area is: A2=(sqrt(2)/2)^2 ==> A2=1/2 The third square has sides 1/2, so the area is (1/2)^2 ==> A3=1/4...
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