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anonymous
 one year ago
The vertices of a parallelogram are A(x1, y1), B(x2, y2), C(x3, y3), and D(x4, y4). Which of the following must be true if parallelogram ABCD is proven to be a rectangle?
anonymous
 one year ago
The vertices of a parallelogram are A(x1, y1), B(x2, y2), C(x3, y3), and D(x4, y4). Which of the following must be true if parallelogram ABCD is proven to be a rectangle?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0(y4−y3x4−x3=y3−y2x3−x2) and (y4−y3x4−x3×y3−y2x3−x2)=1 (y4−y3x4−x3=y2−y1x2−x1) and (y4−y3x4−x3×y2−y1x2−x1)=1 (y4−y3x4−x3=y2−y1x2−x1) and (y4−y3x4−x3×y3−y2x3−x2)=1 (y4−y3x4−x3=y3−y1x3−x1) and (y4−y3x4−x3×y2−y1x2−x1)=1 Done

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The vertices of a parallelogram are A(x1, y1), B(x2, y2), C(x3, y3), and D(x4, y4). Which of the following must be true if parallelogram ABCD is proven to be a rectangle?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0this is urgent! someone please help!

hartnn
 one year ago
Best ResponseYou've already chosen the best response.0@Australopithecus @SolomonZelman @surjithayer @mathmate @misty1212 can anyone of you please help this user? thanks.

mathmate
 one year ago
Best ResponseYou've already chosen the best response.0Each option represents the product of the slopes of adjacent sides of two adjacent angles.dw:1435032545515:dw If ABCD is given to be a parallelogram, we only need to prove one angle to be 90 degrees, although the options attempt to show 1. AB is parallel to CD, and Slope of AB, m1 = (y2y1)/(x2x1) Slope of CD, m3 = (y4y3)/(x4x3) If AB is parallel to CD, then m1=m3. 2. Angle BCD = 90 degrees To show 90 degrees, we need to show the products of the slopes of adjacent sides equals 1. Slope of CD, m3= (y4y3)/(x4x3) Slope of BC, m2= (y3y2)/(x3x2) If (m2*m3)=1, then angle BCD=90 degrees. So select the correct option that achieves the above. By the way, there are probably typos in the answer options, I believe they should read: (y4−y3)/(x4−x3)=(y3−y2)/(x3−x2) and (y4−y3)/(x4−x3×y3−y2)/(x3−x2)=1 (y4−y3)/(x4−x3)=(y2−y1).(x2−x1) and (y4−y3)/(x4−x3×y2−y1)/(x2−x1)=1 (y4−y3)/(x4−x3)=(y2−y1)/(x2−x1) and (y4−y3)/(x4−x3×y3−y2)/(x3−x2)=1 (y4−y3(/(x4−x3)=(y3−y1)/(x3−x1) and (y4−y3)/(x4−x3×y2−y1)/(x2−x1)=1 Make your choice accordingly.
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