2
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two! 2 are obtuse, 2 are acute If there are three right angles, then it makes it a parallelogram, ex: a square or a rectangle
None because it has 4 right angles
A parallelogram doesn't need any right angles in order to be a parallelogram.If it has any, then it's a special kind of parallelogram, called a "rectangle".Note:The way the properties of a parallelogram work out,if it has one right angle, then it has four of them.
A rhombus have 2 obtuse angles
There are 3 obtuse angles in a heptagon.