sometimes
- always as a square and rectangle
- never as a rhombus or any even-numbered polygon.
so, sometimes they have 90 degree angles
2007-08-27 09:31:57
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answer #1
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answered by Dani 2
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Not necessarily. A parallelogram with four right angles is called a rectangle or square. Generally, a parallelogram has four sides where the opposing sides of the quadrilateral are parallel to each other. The angles would be acute and obtuse, two of each. Thus you have a quadrilateral being any figure with four sides. When those sides are parallel, it becomes a parallelogram. When those sides are connected with right angles, it becomes a rectangle and when the sides are of equal length, it becomes a square.
2016-05-19 03:36:47
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answer #2
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answered by ? 3
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sometimes
Squares and Rectangles are parallelograms with four right angles.
A Rhombus is a parallelogram with 2 acute and 2 obtuse angles.
2007-08-27 09:21:23
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answer #3
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answered by JL 3
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Nope, not necessarily. A parallelogram must have four sides joined at four angles with each set of opposite sides being parallel in euclidean Geometry.
2007-08-27 09:25:42
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answer #4
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answered by Spicemon 2
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sometimes.
a rectangle is a parallelogram and has 4 right angles, but a parellelogram does not have to have right angles. it just requires that the opposite sides are parallel to each other.
2007-08-27 09:21:17
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answer #5
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answered by Anonymous
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Never
Only a square or rectangle has 4 right angles.
A right angle is 90 degrees.
Parallelograms look like they have been squashed.
Check the images I found on Google.
2007-08-27 09:28:31
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answer #6
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answered by barefoot1957 2
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sometimes.
a square and a rectangle have four right angels, but a rhombus does not. all three of these are parallelograms.
2007-08-31 09:20:10
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answer #7
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answered by Merlyn 7
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Sometimes, when it is a rectangle or square. Option 2. ANS
2007-08-27 09:22:36
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answer #8
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answered by Anonymous
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Sometimes
2007-08-27 09:20:39
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answer #9
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answered by Lady Geologist 7
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sometimes - but then it is a rectangle.
2007-08-27 09:21:30
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answer #10
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answered by Anonymous
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