If two isosceles triangles have a common base, prove that the line joining their vertices bisects the common base at right angles.

If two isosceles triangles have a common base, prove that the

1.	If two isosceles triangles have a common base, prove that the line joining their vertices bisects the common base at right angles.
Answer» If two isosceles triangles have a common base, prove that the line joining their vertices bisects the common base at right angles.