An irregular heptagon is one in which at least one of the sides or at least one of the angles is different from the rest.
yes
If you meen the three angles, all tirangles angles add to 180 degrees. But all of the angles must be different, that's what makes it an acute triange. So three.
A scalene triangle
There are at least 28 different pairs of angles: 66 if the first two lines are not parallel. Your question needs to be more specific as to which angles you mean.
It has at least two sides of different length or at least two angles of different measure.
A straight line perhaps
An irregular heptagon is one in which at least one of the sides or at least one of the angles is different from the rest.
Right angles Rectangle Diagonals Triangle Trapezoid Symmetry A 2D or 3D shape Rays Circle Arc Parallel lines Oval
Species
yes
If you meen the three angles, all tirangles angles add to 180 degrees. But all of the angles must be different, that's what makes it an acute triange. So three.
A scalene triangle
A triangle perhaps which has only 3 sides
There are at least 30 angles between edges in a right pentagonal prism. If the entlgon is regular there are two different vlues for these angles; 90 and 108 degrees.
There are at least 28 different pairs of angles: 66 if the first two lines are not parallel. Your question needs to be more specific as to which angles you mean.
An isoceles triangle has at least two sides equal; an equilateral has three sides equal so it is also isoceles; and since all angles are acute it is also an acute traingle