Question

Q. 7 Define parrel lines. List undefined terms and define term.

Answer 1

Dear student,
Two lines are said to be Parallel , If the perpendicular distance between remains constant.
According to Euclid, Parallel lines in same plane cannot intersect each other.

Undefined terms means whose end cannot be determined .
Undefined terms are Points , Line , Plane
Points has no definite size. Line does not have definite Length . Plane does not have definite boundary .

Defined terms are 1) Line segment (It has specific length and direction)
2) Ray ( A Ray is a line which extends only in one direction) (Fixed point of ray is called endpoint)
3) Opposite Rays( Two Rays having same endpoint but extends in opposite direction)
4) Angle ( Two Rays having same endpoint but extends in different direction , Angular distance between two rays is called Angle )

Regards