# A quadrilateral with four congruent sides and an angle measuring 60 degrees must be a?

Rhombus.

If the angle is right angle, it is a square.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- What are real-life examples of parallelograms?
- Can a quadrilateral be both a rhombus and a rectangle? Please explain.
- A parallelogram has sides with lengths of #18 # and #4 #. If the parallelogram's area is #12 #, what is the length of its longest diagonal?
- Two opposite sides of a parallelogram each have a length of #9 #. If one corner of the parallelogram has an angle of #(3 pi)/4 # and the parallelogram's area is #36 #, how long are the other two sides?
- Do rhombuses, squares and rectangles all share properties of parallelograms?

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