Scalene triangle * * * * * A scalene triangle does not have rotational symmetry of order 3. The triskelion (the three legs) on the Isle of Man flag, or a simplified version of that shape will meet the requirements.
They are perpendicular lines that meet at right angles which is 90 degrees.
Only when it is in the form of a right angle triangle that it will have perpendicular lines that meet at 90 degrees.
No but it has perpendicular lines that meet at right angles.
They meet perpendicularly. Perpendicular lines meet at a 90 degrees angle.
It only has 2 lines of symmetry because if you were to fold over its diagonals they wouldn't meet exactly unlike a square which will meet exactly from corner to corner.
Assuming it is regular, there should be 6 lines of symmetry, three running from a tip to the tip opposite it, and three through the points that the tips meet.
"right angle" is two lines that intersect at 90 degrees "acute angle" is when 2 lines meet at less than 90 degrees "obtuse angle" is when lines meet at an angle more than 90 degrees , a straight angle is when 2 lines meet at exactly 180 degrees.
A square has both parallel and perpendicular symmetry. It is composed of two sets of parallel lines that meet at perpendicular angles.
90 degrees
Perpendicular lines meet at 90 degrees
Perpendicular lines meet at 90 degrees