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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
