Yes
Tangents ..... are parallel under conditions you gave. A tangent to a circle is perpindicular to the radius (diameter) at the point of contact. 2 lines perpindicular to the same line are parallel.
Yes
Not always take a trapezoid for example.
A line which cuts a line segment into two equal parts at 90°.
Parallel.
trapezoid
Parallel lines never intersect and always remain equal distance from each other.
It is equal to 1, but not always: the reciprocal must be defined for the equality and the reciprocal is not always defined.
corresponding angles are only equal if the angles are b/w the parallel lines.
A triangle has 3 sides. A regular triangle has all EQUAL sides. An isosceles triangle has 2 EQUAL sides. A scalene triangle has NO equal sides. Equal = parallel..basically equal and parallel are the same thing, in this conversation.
Yes, the diagonals of a square are congruent (equal in length) and are perpendicular.
Parallel lines remain equal distance apart and never intersect with each other.