define the geomatrical figure traingle
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A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry. A triangle with vertices A, B, and C is denoted . In Euclidean geometry, any three points, when non-collinear, determine a unique triangle and simultaneously, a unique plane (i.e. a two-dimensional Euclidean space).
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Step-by-step explanation:
a triangle is a 3 sided polygon. Triangles are classified on the basis of sides and angles
on basis of side-scalene, equilateral, and isoscles
on basis of angle- acute, right(90°), obtuse angled triangle
scalene- all sides are different length
equilateral-all sides same length
isoscles- 2 sides same length
acute- all angles are <90
right angle-1 angle is 90
obtuse angle- 1 angle is >90
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