The properties of all rhombuses are as follows:
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The diagonals bisect each other at a 90 degree angle.
- True. This is a property of all rhombuses.
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All angles are 90 degrees.
- False. While a rhombus can have right angles, not all rhombuses have all angles as 90 degrees. In fact, a rhombus with all angles equal to 90 degrees is specifically a square.
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All four sides are equal length.
- True. This is a defining property of a rhombus.
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Opposite angles are equal.
- True. In a rhombus, opposite angles are always equal.
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The diagonals are congruent.
- False. This is not a property of all rhombuses. The diagonals are only congruent in a square.
Based on this analysis, the correct properties of all rhombuses are:
- The diagonals bisect each other at a 90 degree angle.
- All four sides are equal length.
- Opposite angles are equal.