Answers: 1
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?
Answers: 2
Mathematics, 21.06.2019 19:00, shadow29916
Solve x+3y=6 and 4x-6y=6 by elimination . show work !
Answers: 1
Mathematics, 21.06.2019 20:30, leeshaaa17
Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0
Answers: 2
What is the reciprocal of 6/7...
Mathematics, 06.11.2020 22:00
Biology, 06.11.2020 22:00
Biology, 06.11.2020 22:00
Biology, 06.11.2020 22:00
History, 06.11.2020 22:00
Physics, 06.11.2020 22:00
Mathematics, 06.11.2020 22:00
Mathematics, 06.11.2020 22:00