Chapter 2.5, Problem 2CE

To determine

The eight right angles.

Answer to Problem 2CE

  $\begin{array}{l}\angle AOC,\angle AOD,\angle BOC,\angle BOD,\\ \angle EOG,\angle EOH,\angle FOG\text{and }\angle FOH\end{array}$

Explanation of Solution

Given:

The given figure is,

  

Also, $\overleftrightarrow{AB}\perp \overleftrightarrow{CD}$ and $\overleftrightarrow{EF}\perp \overleftrightarrow{GH}$

When two lines are perpendicular, they will make an angle of 90 degrees i.e. right angle.

From the given figure, as $\overleftrightarrow{AB}\perp \overleftrightarrow{CD}$ and $\overleftrightarrow{EF}\perp \overleftrightarrow{GH}$

So the eight right angles are:

  $\begin{array}{l}\angle AOC,\angle AOD,\angle BOC,\angle BOD,\\ \angle EOG,\angle EOH,\angle FOG\text{and }\angle FOH\end{array}$