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Mathematics, 28.07.2019 12:50 alvaradolm9723
Volume of a cube with the dimensions of length of 1/2 width1/2 height 1/2
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Mathematics, 20.06.2019 18:04, Uc34758
Here is their argument. given the obtuse angle x, we make a quadrilateral abcd with ∠dab = x, and ∠abc = 90◦, and ad = bc. say the perpendicular bisector to dc meets the perpendicular bisector to ab at p. then pa = pb and pc = pd. so the triangles pad and pbc have equal sides and are congruent. thus ∠pad = ∠pbc. but pab is isosceles, hence ∠pab = ∠pba. subtracting, gives x = ∠pad−∠pab = ∠pbc −∠pba = 90◦. this is a preposterous conclusion – just where is the mistake in the "proof" and why does the argument break down there?
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Mathematics, 21.06.2019 19:30, Cupcake8189
Which inequality has a dashed boundary line when graphed ?
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Volume of a cube with the dimensions of length of 1/2 width1/2 height 1/2...
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