| 21. | The result is an image that subtends about 30 degrees and appears to exist 11 feet from your eyes.
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| 22. | Each side of a regular octagon subtends half a right angle at the centre of the circle which connects its vertices.
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| 23. | It is the distance at which the mean radius of the Earth's orbit would subtend an angle of one arcsecond.
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| 24. | Monocular cues include size : distant objects subtend smaller visual angles than near objects, grain, size, and motion parallax.
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| 25. | Visual acuity = Distance at which test is made / distance at which the smallest optotype identified subtends an angle of 5 arcminutes.
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| 26. | MS-Aloha adopts a different approach and subtends the following hypotheses and rules which, basically, define all its main mechanisms.
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| 27. | Similarly the diagonals are equal to the sine of the sum of whichever "'pair "'of angles they subtend.
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| 28. | This image subtends an angular range of over 10?and required use of a shorter than usual camera length " L ".
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| 29. | It turns out that the length ( where the third side subtends an angle of ? with the second side extended ) must be:
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| 30. | For some purposes the rays of the sun can be considered as practically collimated, because the sun subtends an angle of only 322 of arc.
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