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20 Cards in this Set

  • Front
  • Back
triangle
a three sided figure
quadrilateral
a four sided figure
pentagon
a five sided figure
hexagon
a six sided figure
octagon
an eight sided figure
right triangle
a triangle with one right angle
acute triangle
a triangle with ALL acute angles
obtuse triangle
a triangle with ONE obtuse angle
scalene triangle
a triangle with NO congruent sides or angles
isosceles triangle
a triangle with TWO congruent sides and angles
acute angle
measures less than 90 degrees
obtuse angle
measures more than 90 degrees
right angle
measures 90 degrees
straight angle
measures 180 degrees and makes a straight line
equilateral triangle
a triangle with ALL congruent sides and angles
parallelogram
a quadrilateral with opposite sides congruent and parallel
rhombus
a parallelogram with ALL congruent sides
square
a parallelogram with ALL congruent sides and angles, all angles are 90 degrees
rectangle
a parallelogram with opposite sides congruent and parallel AND all 90 degree angles
trapezoid
a quadrilateral with ONE pair of opposite sides parallel