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1. if ABCD is a parallelogram, m
a. 3
b. 31
c.61
d.121

2007-10-28 08:59:53 · 15 answers · asked by Conie C 1 in Science & Mathematics Mathematics

15 answers

The answer would be C. Reason:

since they give us that the shape is a parallelogram we know that A plus D should be equal to 180 degrees. So take A+D=180, which becomes x+2x-3=180. Where its becomes 3x=183. Then divide both sides by 3 and get x=61.

2007-10-28 16:05:43 · answer #2 · answered by Anonymous · 0 0

Alright, there are several rules when it comes to a parallelogram. First, angles that are opposite are equal to each other. Second, angles that are next to each other add up to 180 degrees. There are others, but they don't pertain to this. So, since angle A and angle D are next to each other, they should add up to 180.

x+2x-3=180, which means that 3x=183, so x=61. The answer is c.

2007-10-28 16:04:48 · answer #4 · answered by rotcfreak1 5 · 0 0

In any parallelogram, adjacent angles are supplementary. So we know that m∠A + m∠D = 180°. But m∠A = x and m∠D = 2x-3, so this becomes:

x + 2x - 3 = 180°
3x = 183°
x = 61°

So the correct answer is C.

2007-10-28 16:03:36 · answer #5 · answered by Pascal 7 · 0 1

61

2007-10-28 16:09:29 · answer #6 · answered by Anonymous · 0 0

C.61

it's really simple if u draw it out

parallelogram:


x + (2x - 3) = 180
3x = 183
x = 61

2007-10-28 16:02:30 · answer #7 · answered by Anonymous · 0 1

61 common sense

2007-10-28 16:02:39 · answer #9 · answered by cgghtb f 2 · 0 1

I have no idea but I know if this is a test question you shouldn't guess. I also know that if this isn't a test question you should guess and then do logical reasoning.

2007-10-28 16:05:52 · answer #10 · answered by heyjeniceko 2 · 0 0

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