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Are the opposite angles in rectangles and rhombuses equal?
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Let’s consider rectangles and rhombuses.
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What do we know about the angles in rectangles?
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In a rectangle, all four angles are right angles.
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Opposite angles both measure 90 degrees.
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And again, opposite angles measure 90 degrees.
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We can say that that is true for rectangles.
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But what can we say about a rhombus?
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In a rhombus, all sides have equal length and here the opposite angles.
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We can also say that opposite sides in this rhombus are parallel.
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A rhombus is a parallelogram.
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And inside parallelograms, opposite angles are equal.
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Both a rhombus and a rectangle is a parallelogram.
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And so it’s true that opposite angles are equal in rectangles and rhombuses.