DANE’S VOCABUnit 5

Acute angle:A acute angle is more then 0 degrees and less then 90

degrees

Adjacent angles angles that are next to each other

Axis Either of the to number lines that intersect to form a coordinates grid

Bisecting an angleand angle cute in half

Concentric circlesCircles that have the same center

Congruent figuresHaving the shape and size

Consecutive anglesTo angles in a polygon the have that share a common side

Corresponding angles or sidesHaving the same relative position in similar or conglutinate figurs

InscribedIn side of

IsometryA transformation such as a translation(slide) reflection(flip) or rotation(turn) that

changes the position or orientation of a figure but does not change its size or shape

Line of reflection a line halfway between a figure and its reflected image

Mid pointA point halfway between two other points. The mid point of a

line segment

Obtuse angleA angle that over 90 degrees and less that 180 degrees

Ordered number pairTwo numbers that are used to locate a point on a coordinate grid.

Parallel lineNever meeting and always the same distance apart

PerpendicularMeeting at right angles, lines , rays ,line segments and planes that

meet at right angles

Perpendicular bisectorA line segment that bisects the side of a triangle

Preimagea geotrical figure that is somehow changed to purduce a nother

figure

Reflectionthe flipping of a figure over a line so the image is a mirrior image

of the origanal

Reflex angleA angle over 180 degrees

Right AngleAn angle that is a perfect 90 degrees

RotationA movment of a figure around a fixed point or axis

SectorA section of a percent circle

Straight angle A angle that measure a perfect 180 derees

Supplementary anglesTwo angles whose measures total 180 degrees

TransformationSomething done to geometric figure that produces a new one

TranslationA movement of a figure crossed a straight line

TransversalA line that intersects two or more lines

VertexThe point where a rays of an angle

Vertical anglesWhen two lines intersect,the angle that do not have a common side.