DEMO ONLY-Central angle is twice the angle in remaining part

DEMO ONLY-Central angle is twice the angle in remaining part
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Geogebra applet showing Central angle is twice the angle in remaining part.

https://files.metastudio.org/media/5/3/0/2068d4ed04f8c41ed1e227f9fb90007631f6f53f441de557b03b1da952b69.html

License: CC-BY-SA 4.0 unported
Source: NCERT