Mathematics, 17.07.2020 20:01 xeskimopie
Lenny's dog Roo loves dog biscuits. Lenny buys two different flavors and feeds them to Roo in the ratio represented in the tape diagram. Based on the ratio, how many pumpkin biscuits should Lenny buy when he buys 24 liver biscuits?
Answers: 2
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
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Answers: 1
Lenny's dog Roo loves dog biscuits. Lenny buys two different flavors and feeds them to Roo in the ra...
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