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Interior Angles of a Triangle
The interior angles of a triangle always add up to 180° (or
radians). You can see that by putting the corners together and observing the straight line that they create.
Contributed by:
Jon McLoone
THINGS TO TRY
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Drag the corners of the triangle to change the angles but notice how the total of the angles never changes.
RELATED LINKS
Triangle
(
Wolfram
MathWorld
)
PERMANENT CITATION
"
Interior Angles of a Triangle
" from
the Wolfram Demonstrations Project
http://demonstrations.wolfram.com/InteriorAnglesOfATriangle/
Contributed by:
Jon McLoone
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Related Topics
Geometric Models
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Triangles
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Related Curriculum Standards
US Common Core State Standards, Mathematics
HSG-CO.C.10