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Mathematics, 17.08.2021 18:30 lillianneal

Ion tion
Using parallel lines and rotations, we can understand why the angles in a triangle always add to 180°. Here
is triangle ABC. Line DE is parallel to AC and contains B.
D
B
E



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A


Ion

tion
Using parallel lines and rotations, we can understand why the angles in a triangle alway

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Using parallel lines and rotations, we can understand why the angles in a triangle a...
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