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Classifying Shapes
Classifying 2D Shapes
Term | Definition |
---|---|
attribute | a quality or characteristic belonging to something |
congruent | having the same shape and size |
polygon | a closed figure formed by three or more line segments |
quadrilateral | a four sided polygon |
rectangle | a quadrilateral with four right angles and opposite side are equal; 2 sets of parallel sides |
square | A parallelogram with four congruent sides and four right angles; 2 sets of parallel sides |
trapezoid | A quadrilateral with exactly one pair of parallel sides |
parallelogram | a quadrilateral with two pairs of parallel sides |
rhombus | a parallelogram with four congruent sides; 2 sets of parallel sides |
scalene triangle | a triangle with no congruent sides |
isosceles triangle | a triangle with two equal sides |
equilateral triangle | a triangle with three congruent sides |
acute triangle | a triangle with three acute angles |
right triangle | a triangle with one right angle |
obtuse triangle | a triangle with one obtuse angle |
parallel lines | lines in the same plane that do not intersect |
perpendicular lines | lines that intersect to form right angles |
hierarchy | a group organized by rank |