Triangle, I have 3 sides and 3 angles, Line Segment, What kind of line am I?, Ray, I am a line with 1 endpoint, what kind of line am I?, Decagon, What am I?, Acute Angle, My angle is less then 90 degrees, what kind of angle am I?, Plane, A closed, two-dimensional or flat figure is called a ______ shape, Obtuse Angle, What kind of angle am I?, 2 Dimensional Shapes, Are these 3D or 2D shapes?, Closed Shapes, Are these shapes Open or Closed?, Polygons, What are plane figures with at least three straight sides and angles, and typically five or more called?, Quadrilateral, What shape has 4 sides and 4 angles?, Right Angle, What kind of angle is this (why is that box there?), Parallel Lines, What kind of lines are these, Octagon, This polygon has 8 sides, Trapezoid, A quadrilateral with only one pair of parallel sides., Rectangle, I have two longs sides, and 2 short sides, what shape am I?, Square, I have 4 equal sides, and 4 right angles, what shape am I?, Rhombus, A parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides., Pentagon, I have 5 sides, what shape am I?, Intersecting Lines, These lines cross paths or touch, what are they called?, Hexagon, I have 6 sides, what shape am I?, Perpendicular Lines, We are lines that intersect and make right angles, what kinds of lines are we?, Open, Am I an open or closed shape?

3rd Grade Math Shapes/Lines

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