Triangle Names and Angle Sum (Interior and Exterior)

Autor:Mr James Bowater, Morton Betts

How to name triangles. The conditions for naming triangles. Proof the sum of interior (inside) angles = 180 deg. Proof the other two angles equal exterior angle.

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Dividing a 2-digit number by a 1-digit number (1)
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trigonometrija
MG 12 Ptolemey's
Central, Inscribed, and Circumscribed Angles
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