Seen from the proper angle, there is no problem seeing the difference.

To get a hole-in-one, you must select the proper angle and amount of force.

He quickly calculated the course necessary to achieve the proper angle.

He tried to guess the proper angle and began to cut steps into the rock.

She had to lean forward to get the proper angle.

It did, but he didn't find a proper angle to view Brett's machine.

The distance was too great to allow a proper angle of sight.

Since the hat was on top, he settled it to his head at the proper angle.

At the proper angle, there was a tight passage between the two masses.

"The ball was hit pretty good, but with a proper angle, he might have caught it."