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Categorizing geometric shapes: practice examples | 4th grade | Khan Academy
Watch and do these example exercises along with us. Remember what you have learned about perpendicular lines, right, obtuse, and acute triangles. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-geometry-topic/cc-4th-classifying-shapes/e/classifying-shapes-by-line-and-angle ...
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