The number of interwoven isosceles triangles in Sriyantra is

Which of the following statements are true?

(i) A line segment has no definite length.

(ii) A ray has no end point.

(iii) A line has a definite length.

(iv) A line is the same as line .

(v) A ray is the same as ray .

(vi) Two distinct points always determine a unique line.

(vii) Three lines are concurrent if they have a common point.

(viii) Two distinct lines cannot be both parallel to the same line.

(ix) Two intersecting lines cannot be both parallel to the same line.

(x) Open half-line OA is the same thing as ray

(xi) Two lines may intersect in two points.

(xii) Two lines I and m are parallel only when they have no point in common.

In ancient India, the shapes of altars used for household rituals were

Thales belongs to the country

Euclid belongs to the country