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.
One.
If it is a 45° 45° 90° isosceles right triangle, then there are 2 sides that are perpendicular.
No. An isosceles right triangle is a special case. There are many right triangles which are not isosceles.
An isosceles triangle has only 1 line of symmetry.
It varies depending on the angles and lines of the triangle.
1One
one
one
One
None.
2