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

1 Answer
Mar 8, 2018

Answer:

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 #SSS# 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.