3
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.
Depends on the type of triangle. For a ; - Equilateral triangle - 3 lines Isosceles triangle - 1 line Scalene triangle - 0 (zero) lines. For a right-angled triangle, it can be either 1 lines or no lines, but NOT 3 lines.
An isosceles triangle has only 1 line of symmetry.
It varies depending on the angles and lines of the triangle.
1One
one
2
One
None.