| 1. | The dihedral angle is the interior angle between any two face planes.
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| 2. | The sum of the interior angles of any non-self-intersecting 257-gon is 91800?
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| 3. | The sum of the interior angles of any non-self-intersecting 65537-gon is 23592600?
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| 4. | In normal space, the interior angles of a rectangle measure 90 degrees each.
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| 5. | There is a blackish spot at the interior angle.
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| 6. | First, if a transversal intersects two parallel lines, then the alternate interior angles are congruent.
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| 7. | For example, the sum of the interior angles of a spherical triangle exceeds 180 degrees.
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| 8. | Girard also showed how the area of a spherical triangle depends on its interior angles.
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| 9. | A 120 degree angle has an interior angle of 120 and an exterior angle of 60.
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| 10. | The AA postulate states that the interior angles of a triangle are always equal to 180?
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