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Mathematics
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Beginner
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Grade 4 · Spring
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Triangles
Triangles
3 Knowledge points
Estimated time · 25 min
0%
01
Sides of a triangle
Two sides together exceed the third
8 min
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02
The angle sum of a triangle
Always 180°
8 min
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03
Classifying triangles
Three kinds by angle, three by side
9 min
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