Aline that intersects one of two parallel lines intersects the other also."?
always
sometimes
never

a line that intersects one of the two parallel lines must intersect other parallel line as it is self evident that a line never cuts any line parallely . It always cuts at an angle and if it is at an angle to one of the parallel ines other than 180 then it must be at an angle to the other line.

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6