What is the difference? –4.16 – (–2.3)
a.
–6.46
b.
–1.86
...
Mathematics, 19.12.2019 06:31 samyajones68
What is the difference? –4.16 – (–2.3)
a.
–6.46
b.
–1.86
c.
1.86
d.
6.46
Answers: 3
Mathematics, 20.06.2019 18:04
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?
Answers: 2
Mathematics, 21.06.2019 16:50
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Answers: 1
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Mathematics, 21.06.2019 19:30
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