<p>I’m drawing another blank ._.</p>
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<p>The answer is B. I can understand it by seeing the opposite sides of the square as parallel lines intersected by the transversal l. Does anyone else have an alternate way of looking at it?</p>
<p>Hrm, I am not sure what I am doing wrong, but I feel like the answer is D. b and k must be = because they are angles of two parallel lines intersecting a line.</p>
<p>are you sure the answer isn’t “D”??</p>
<p>B cannot be the answer. If B is true, the rest of the answers are also all true. Keyed wrong.</p>
<p>The answer is “D” , let’s call the angle above angle a and c “F”, F is 90 degrees and if angle b and c are not equal that means that one of them is either a 30 or a 60
If B= 60 and C=30</p>
<p>180-90-60=30 ( angle A )
180-90-30=60 ( Angle K ) </p>
<p>A and K are not equal</p>
<p>
That’s what I thought, but I thought I was making a mistake since I was doing it in my head.</p>
<p>what book is this out of?</p>
<p>Another way to “see” it: supplementary angles and triangles
a+90+b=180 so a+b=90
b+90+c=180 so b+c=90
c+90+k=180 so c+k=90</p>
<p>b+c=c+k so b=k</p>
<p>I did it like dreamseason!!</p>
<p>
Correct. Had a little typo. The answer is actually D. </p>
<p>
This is awesome. Thank you.</p>
<p>
See title of thread: October 2008 Question-Answer-Service</p>
<p>Thank you all for your responses.</p>
<p>a + b + 90 = 180
c + k + 90 = 180
b + c + 90 = 180</p>
<p>a + b = 90
c + k = 90
b + c = 90</p>
<p>a = 90 - b
b = 90 - a
c = 90 - b
b = 90 - c
k = 90 - c
c = 90 - k</p>
<p>a = c (not an answer choice)
b = k</p>
