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geometry vocabulary

morgan's geometry vocabulary & things

TermDefinition
point an exact location on a plane surface
line goes on forever in both directions, 180 degrees
line segment a section of a line with two end points
ray goes on forever in one direction, has one end point
parallel lines lines that are the same distance apart and they will never intersect
perpendicular lines 2 lines that intersect and form 4 right angles
angles geometric shapes that are formed wherever 2 rays share a common end point
right angle exactly 90 degrees
acute angle smaller than a right angle
obtuse angle larger than a right angle, smaller than a line
strait angle exactly 180 degrees
congruent figures that have the same shape and size, all sides and angles are equal
polygon a closed figure made of line segments
quadrilateral four sided polygon, includes : rectangle, square, rhombus, parallelogram, and trapezoid
rhombus a parallelogram with four equal sides
square a parallelogram with four equal sides and four right angles
rectangle 4 sides, 4 right angles, opposite sides are equal and parallel
trapezoid 4 sided figure, exactly one pair of parallel lines
pentagon 5 sided polygon
hexagon 6 sided polygon
heptagon 7 sided polygon
octagon 8 sided polygon
decagon 10 sided polygon
line of symmetry a line that divides a figure into 2 mirror images
vertex or vertices a point were line segments meet, it is called vertices when there are more than one point
right triangle a right triangle has exactly one right angle
acute triangle acute triangles have 3 acute angles
obtuse triangle an obtuse triangle has exactly one obtuse angle
Created by: Sydmcmillan03
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