Not necessarily. Right triangles do. Others don't.
Not normally but as an isosceles right angle triangle it will have perpendicular lines that meet at 90 degrees.
The Right Triangle. Perpendicular lines make a right angle.
No parallel lines but a right angle triangle has perpendicular lines.
If it is a 45° 45° 90° isosceles right triangle, then there are 2 sides that are perpendicular.
a right scalene triangle
They are not. The perpendicular bisectors of a triangle, for example, intersect at the orthocentre of the triangle. So perpendicular lines can be intersecting and conversely.
There can be only one pair of perpendicular lines in an isosceles triangle when it is a right angled isosceles triangle. A non right angled isosceles triangle has no pairs of perpendicular lines.
No, but there can be perpendicular lines.
a right triangle
The 2 perpendicular sides of a right angle triangle intersect each other at right angles
A right angled triangle.
No but it does have 3 sides 2 of which are of equal lengths.