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Angle Sum Theorem
Author:
Guillermo Bautista
Topic:
Angles
Drag the three vertices of the triangle to choose the shape you want them move slider α to the extreme right.
GeoGebra
What does the applet show about the sum of the interior angles of a triangle?
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이등변삼각형의 꼭지각의 이등분선은 밑변을 수직 이등분한다.(The bisector of the apex angle of the isosceles triangle divides the base vertically.)
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