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A rhombus is a special type of parallelogram in which every side is equal.

• Reopen the parallelogram interactive page

• Adjust the sliders so that the parallelogram is a rhombus.

• What is the angle between the diagonals?

• Explore other properties of a rhombus here.

The Geometer’s Warehouse¹ is packed full of investigations to help you discover more geometric facts.