does it
1.) add up to 180 degrees
2.) add up to 90 degrees
3.) are each greater than 90 degrees
pleases explain your answer
2006-11-25 12:42:41 · 5 answers · asked by sexy k 1 in Science & Mathematics ➔ Mathematics
ABCD is a IIgm(short for parallelogram).
2006-11-25 13:45:40
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answer #1
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answered by Akilesh - Internet Undertaker 7
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So
It has to add up to 180 degrees. Assuming the two angles you have are on the left side of the parallelogram, imagine erasing the right side of the parallelogram. Now extend the top, bottom and left side so that it looks like a big unequal symbol (= with a slash through it). The two angles are now same-side interior angles formed by a transversal. And as we all know, if two lines are parallel (which the top and bottom would have to be parallel, otherwise it would not be a parallelogram), same-side interior angles must equal 180 degrees.
2006-11-25 21:11:41 · answer #2 · answered by Pythagoras 7 · 1⤊ 0⤋
They always add up to 180 degrees. The opposite angles of a parallelogram are congruent.
Let x = angle of one corner and y = angle of the adjacent corner
2x + 2y = 360
x + y = 180
Hope that helped.
2006-11-25 20:45:49 · answer #3 · answered by Anonymous · 1⤊ 1⤋
1) add up to 180 degrees.
2006-11-25 20:54:56 · answer #4 · answered by yupchagee 7 · 0⤊ 1⤋
add up to 180
2006-11-25 20:44:49 · answer #5 · answered by 7 · 0⤊ 1⤋