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anonymous
 one year ago
Please correct my answers. MEDAL AND FAN!!!!!
19. A
20. A
21. B
22. B
anonymous
 one year ago
Please correct my answers. MEDAL AND FAN!!!!! 19. A 20. A 21. B 22. B

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.019) is incorrect. What about dw:1440008761096:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Is 19 the only one that is incorrect?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.029) is incorrect. What about dw:1440008841552:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I believe 21 is correct.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I believe 22 is correct. dw:1440009068239:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Sketch for 21. dw:1440009258663:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Can you correct my work again?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Post a new queation and I'll be glad to have a look at it.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0dw:1440009490508:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0There is no requirement in the question that the quadrilateral be convex. In a polygon with 4 angles, angles that are not consecutive can be considered to be opposite.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0Problem 20 states: two pairs of opposite angles are congruent You showed an example with a concave polygon with ONE pair of angles congruent. You have not shown a proper counterexample to dismiss the statement of problem 20.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0In problem 20, the answer is "Suffucient".

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0Problem 19. Insufficient. Counterexample: an isosceles trapezoid. Problem 20. Sufficient. Problem 21. Insufficient. Counterexample: an isosceles trapezoid. Problem 22. Insufficient. Counterexample: a nonrhombus kite.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So @mathstudent55 , I suppose you would also agree that the following quadrilateral is parallelogram? dw:1440010612059:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0@ospreytriple In response to your last response: 1. These problems deal with convex polygons, so your figure is not illustrative of such a case. Even if you don't see any specific mention of it, we are dealing only with convex polygons. 2. More importantly, we are dealing with Problem 20. You even drew this figure (see below) when you were discussing problem 20. Problem 20 is about 2 pairs of opposite angles congruent, but your figure only shows one pair of congruent angles. That is why I said your figure was not a good counterexample for two pairs of opposite angles. dw:1440036882588:dw 3. With problem 19, about one pair of congruent angles, I definitely agree with you that that is insufficient info to prove the quadrilateral is a parallelogram.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.0@OM14forever Yes, that is correct. 19 B 20 A 21 B 22 B
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