State whether the following statement is true/false:For any point on the x-axis its y - coordinate is zero.

State whether the following statements are true or false : A ray has no end point.

State whether the following statements are true or false : A line has a definite length.

Examine whether the following statements are true or false: { a }∈ { a, b, c }

Examine whether the following statements are true or false: { a }⊂ { a, b, c }

Examine whether the following statements are true or false: { a, b } ⊄ { b, c, a }

State whether the following statements are true or false : Two lines may intersect in two points.

Check whether the following statement is true or false by proving its contrapositive. If x, y in Ζ such that xy is odd, then both x and y are odd.

State whether the following statements are true or false : Line bar(AB) is the same as line bar(BA ) .

State whether the following statements are true or false. a) Density is defined as the mass of the substance contained in unit volume.

State whether the following statements are true or false : Two distinct points always determine a unique line.