Answer:
the internal angle of three side are 180 degree
Explanation:
a closed figure with 3 surfaces.
it is of three types -
equilateral (all angles 60°) (all sides equal)
isoceles (2 sides equal)
scalene (no sides equal)
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Answer:
the internal angle of three side are 180 degree
Explanation:
a closed figure with 3 surfaces.
it is of three types -
equilateral (all angles 60°) (all sides equal)
isoceles (2 sides equal)
scalene (no sides equal)