19 of68 Quadrilaterals Training
  Quadrilateral angles add up to 360 degrees
How do I know that every quadrilateral has four angles that add up to 360°? Well, try this. Draw any quadrilateral you like, using a ruler to make sure you have four straight lines. Then, cut out the shape, rip off each corner and arrange them with their points together. They should all fit together, forming a full circle!
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