A right angle is exactly 90°. An obtuse angle is greater than 90° and less than 180°, a straight line. An isosceles triangle with all angles less than 90° is an acute-angled triangle.
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Geometry Tutorial: Triangles, Congruency & TypesIt categorizes triangles into equilateral, isosceles, scalene, obtuse, right ... The video uses practical examples to illustrate these concepts, emphasizing the importance of triangles in ...
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