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

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?

#### Explanation

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#### Explanation:

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Mar 8, 2018

Rhombus.

#### Explanation:

A quadrilateral with four congruent sides with one acute or obtuse angle is always a rhombus. This can be easily proved by joining a diagonal and using $S S S$ postulate for congruent triangle, which leads to corresponding angles equal and hence opposite sides parallel.

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

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