a circle
3
Here's a list of shapes that need a right angle: square rectangle right triangle
It's not that easy to answer because a straight angle is like a straight line and I think that it would be on either every or none of the shapes that I would know of. Any shape has a right, obtuse,or acute angle. So, I am guessing that no shapes have straight angles. or that a straight angle is in every angle which is not true.
rectangles
a circle
parallelogram
3
Here's a list of shapes that need a right angle: square rectangle right triangle
It's not that easy to answer because a straight angle is like a straight line and I think that it would be on either every or none of the shapes that I would know of. Any shape has a right, obtuse,or acute angle. So, I am guessing that no shapes have straight angles. or that a straight angle is in every angle which is not true.
rectangles
There is no standard angle for a battlefield (not battlefeild!) since they come in all shapes.
Penis
Pentagon.
Angle
Well the list will go on forever but an obtuse angle is an angle bigger than 90 degrees!
Angle