Mammoth Memory

Angles

Perpendicular- At an angle of 90° to a given line (or plane or surface).

Purple dictionary (perpendicular) sat on the book shelf at 90° angle.

NOTE:

Purple dictionary is perpendicular to the book shelf.

Example 1

Example 1 of perpendicular are towers and a road of a bridge which are perpendicular to each other

The towers are perpendicular to the road of the bridge.

 

Example 2

Two lines at nine degrees to each other are perpendicular such as the red and blue lines even though the blue line is at an angle

Although the blue line is on an incline, the red line is still at 90° to it and so is perpendicular to the blue line.

 

Example 3

The sides of a cube are perpendicular to each adjoining side as each side is at ninety degrees the the adjoining one

The sides of a cube are perpendicular to each adjoining side.

 

Example 4

Railway sleepers are laid perpendicular to the train track

Railway sleepers are laid perpendicular to the track.

More Info