Not necessarily, as two lines can exist in one plane, but they don't always touch each other. An example would be parallel lines, where the lines are parallel to each other. Lines are also not necessarily straight all the time as it can be curvy too, wherein that a straight line or another curvy line that "does" touch the first curvy line could possibly intersect at more than one point.
There are no parallel lines in a triangle !
scribbling
An equilateral triangle contains at least 2 lines of symmetry (it actually contains 3 lines of symmetry). An equilateral triangle is also radially symmetric.If the question is "Is there a triangle with exactly 2 lines lines of symmetry?", the answer is no.
If you mean what type of triangle has perpendicular lines then it is right angle triangle.
2, straight and curvy...
Yes, there can be oblique lines in a triangle. However, there can only be oblique lines in a triangle if the triangle is considered to be a 'right' triangle.
An EQUILATERAL Triangle. Two lines of symmetry is ISOSCELES Triangle No lines of symmetyry is SCALENE Triangle.
There are no parallel lines in a triangle.
Just draw a line... not a straight line, but a curvy one... Some people would draw two parallel curvy lines, with equally-spaced diagonal lines between, to represent the 'twist' of the rope.
Not necessarily, as two lines can exist in one plane, but they don't always touch each other. An example would be parallel lines, where the lines are parallel to each other. Lines are also not necessarily straight all the time as it can be curvy too, wherein that a straight line or another curvy line that "does" touch the first curvy line could possibly intersect at more than one point.
There are no parallel lines in a triangle !
The Right Triangle. Perpendicular lines make a right angle.
scribbling
An isosceles triangle has 1 line of symmetry, an equilateral triangle has 3 and a scalene triangle has no lines of symmetry.
If the shape has three straight lines and no other lines then it has to be a triangle
No parallel lines but a right angle triangle has perpendicular lines.