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# Geo Vocab 8

### Geomerty Vocabulary for Chapter 8

Congruent Having the same size and shape
Line a straight path that extends without end
Line Segment Having a line between two endpoints
Plane a flat surface that extends forever
Point a location in space
Ray A part of a line that starts at one endpoint and extends forever
angle a figure formed by two rays
vertex the point where two sides intersect
acute vertex a vertex that measures less than 90
Complementary Angles two angles whose measures add up to 90
obtuse angle a angle whose measure is greater than 90 but less than 180
right angle an angle that measures 90
straight angle an angle that measures 180
supplementary Two angles that have the sum of 180
adjacent angles Angles in the same plane that have a common vertex
corresponding angles A pair of angles formed by a transversal and two line
parallel line lines in a plane that do not intersect
perpendicular lines lines in a plane that intersect
skew lines lines that lie in different planes
transversal a line that intersects two or more lines
vertical angles A pair of opposite congruent angles
arc a part of a circle named by the endpoints
center of a circle a point in a circle that is equal distance away from all parts of the circle
central angle a angle with a vertex at the center of a circle
chord a line segment with endpoints on a circle
circle The set of all points in a plane
diameter a line segment that passes through a circle
radius a line segments with one endpoint in the circle on the edge
sector a region enclosed by two radia
poloygon closed plane figure formed gy three or more line segments that intersect only at thier endpoints
regular polygon a polygon with congruent sides and angle
acute triangle a triagle that has at least one acute angle
obtuse triangle an triangle that has an angle whose measure is greater than 90 but less than 180
right triangle an triangle that has an angle whose measure is 90
isosacles triangle a triangle that has at least two congruent sides.
paralellogram A quadrilateral with two pairs of equal sides
rectangle A parallelogram with four right angles
square a rectagle with four congruent sides
rhombus a parrelgram with four equal sides
trapoziod A quadlatertical with exactly four equal sides
Side Side
image a figure resulting from a transformation
line of reflection a line that a figure is flipped across
reflection a transformation of a figure
rotation a figure that is turned around a point
transformation a change in size or position
translation a movement or slide across a figure
asymmetry not identical on either side of a central line
center the point of which a figure is rotated
line of symmetry a “mirror” line of symmetry
line symmetry identical on either side of a central line
rotational symmetry can be rotated less than 360 and coincide with the original figure
Created by: 10004806