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Triangles & Quadrilaterals

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  • a quadrilateral with one pair of parallel sides
    trapezoid
  • two lines that meet at a right angle
    perpendicular lines
  • describes a characteristic or feature of a shape
    attributes
  • a polygon with 4 sides and 4 angles
    quadrilateral
  • a polygon with 3 sides and 3 angles
    triangle
  • a quadrilateral with two pairs of parallel sides
    parallelogram
  • two lines that never intersect
    parallel lines
  • a triangle with all equal side lengths
    equilateral triangle
  • a quadrilateral with two pairs of parallel sides and four right angles
    rectangle
  • same size and shape
    congruent
  • a quadrilateral with two pairs of parallel sides, four right angles, and four equal sides
    square
  • a triangle with no equal side lengths
    scalene triangle
  • a quadrilateral with two pairs of parallel sides and four equal sides
    rhombus
  • a triangle with 2 equal side lengths
    isosceles triangle
  • a triangle with one 90 degree angle
    right triangle
  • a triangle with all angles less than 90 degrees
    acute triangle
  • a triangle with one angle larger than 90 degrees
    obtuse triangle
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