Perpendicular Lines

Write the locus of the points equidistant from the two given points.

Which of the following objects are perpendicular to the floor?

Choose the perpendicular line in the following.

If  $\mathrm{AB}\perp \mathrm{CD}$ then we write that line  $\mathrm{AB}$ is perpendicular to $\mathrm{CD}$.State true or false.

If a line $\mathrm{AB}$ is perpendicular to $\mathrm{CD}$, we write  $\mathrm{AB}\perp \mathrm{CD}$.

Look at the picture given below. Decide whether the lines given in the picture are parallel or perpendicular to each other.

If line segment $\mathrm{AB}$ is the perpendicular bisector of the line segment $\mathrm{CD}$ at $\mathrm{O}$. Find the value of $\mathrm{\angle }\mathrm{BOC}$. (Write the answer without degree symbol)