If a pair of perpendicular lines are rotated, which is true?

a) rotating perpendicular lines result in parallel lines.
eliminate
b) the lines remain perpendicular only if rotated 180°.
c) the lines remain perpendicular only if rotated 360°.
d) rotated perpendicular lines always remain perpendicular lines.

For how answer my question this will be the last question can you answer in math subject

In the given figure ar(adf) =ar(cda) and ar(cdf) = ar(cdf). show that abdc and cdfe are trapeziums.

Match the scale and the actual area to the area of the corresponding scale drawing. scale: 1 inch to 4 feet actual area: 128 square feet scale: 1 inch to 7 feet actual area: 147 square feet scale: 1 inch to 8 feet actual area: 256 square feet scale: 1 inch to 5 feet actual area: 225 square feet area of scale drawing scale and actual area scale drawing area: 3 square inches arrowright scale drawing area: 8 square inches arrowright scale drawing area: 4 square inches arrowright scale drawing area: 9 square inches arrowright