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Opposite Angles of a Quadrilateral in a Circle
The sum of the opposite angles of a "simple" quadrilateral in a circle is 180°.
Drag the vertices on the circle to change the angles.
Contributed by:
Jay Warendorff
THINGS TO TRY
Drag Locators
SNAPSHOTS
RELATED LINKS
Cyclic Quadrilateral
(
Wolfram
MathWorld
)
Quadrilateral
(
Wolfram
MathWorld
)
PERMANENT CITATION
"
Opposite Angles of a Quadrilateral in a Circle
" from
the Wolfram Demonstrations Project
http://demonstrations.wolfram.com/OppositeAnglesOfAQuadrilateralInACircle/
Contributed by:
Jay Warendorff
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Related Topics
Euclid's Elements
Plane Geometry
Polygons
High School Geometry
High School Mathematics
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Related Curriculum Standards
US Common Core State Standards, Mathematics
HSG-C.A.2
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