Quadrilateral Names and Angle Sum (Interior and Exterior)

Emne:Vinkler, Parallelogram, Firkanter, Rektangel, Rombe, Kvadrat, Trapez

How to name quadrilaterals. The conditions for naming quadrilaterals. Proof the sum of interior (inside) angles = 360 deg. Proof the other three angles equal exterior angle.

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Open Education 2026
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