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geometry vocabulary


acute angle angle with a measure between 0 and 90 degrees
acute triangle has 3 acute angles
adjacent angles shares a vertex and a side but have no interior points in common
angle formed by 2 rays with a common endpoint(vertex)
angle bisector ray that divides an angle into angles of ewual measures
arc part of a circle
central angle an angle whose vertex is the center of a circle sum=360
chord segment that has both endpoints on the circle
circle set of points in a plane that are all the same distance
circle graph graph of data where the circle represents the whole
compass geometric tool used to ddraw circles or acrs
complementary some adds up to 90 degrees
congruent angles have the same measure
congruent polygons 2 polygons are congruent if they have exactly the same shape and size
congruent sides has the same length
decagon 10-sided polygon
diameter segment that passes throught the center of a circle and has both endpoints on the circle
perpendicular bisector segment bisector that is perpendicular to the segment
regular polygon polygon with all the sides and angles are congruent
segments has 2 endpoints and all the points of the line between the endpoints
segment bisector a line, segment, ir ray that goes throught the midpoint of a segment
skew lines lie in different planes neither parallel nor intersecting
straight angle angle of 180 degrees
isoscles triangle triangle with atleast 2 congruent sides
scalene triangle triangle with no congruent sides
equilateral triangle 3 congruent sides
hexagon 6-sided polygon
intersecting lines 2 or more lines that cross eachother
irregular oolygon measure greater than 90 but less than 180 degrees
line series of points that extends in 2 opposite directios without an endpoint
midpoint the point that divides the segment into 1 segments of equal length
obtuse angle angle measure greater than 90 but less than 180
obtuse triangle polygon, sides and or angles that aren't all congruent
octagon 8-sided polygon
parallel lines lines in the same plane that never intersect
parallelogram quadrilateral with both pairs of opposite sides parallel
pentagon 5-sided
perpendicular lines intersect to form right angle
plane is a flat surface that extends indefinitely in all directions
point location that has no size
polygon closed figures formed by 3 or more lines, lines don't cross
quadrilateral 4-sided
radius segement that connects the center to the circle
ray one endpoint and all the points of the line on one side of the point
rectangle parallelogram with 4 right angles
rhombus parallelogram with 4 congruent sides
right triangle one right angle of a triangle
square parallelogram with 4 right angles and sides
trapezoid exactly 1 pair of parallel sides
Created by: monto216