1st Column
An exact location; a point is named with a capital letter
POINT
LINE
A line that cuts across a figure connecting two vertices that are not adjacent
Diagonal
a four sided Polygon; angles total 360 degrees
Quadrilateral
A part of a line that has two endpoints
Line Segment
Part of a line that starts at an endpoint and goes on forever in one direction
RAY
Heptagon
A triangle with no congruent sides
Scalene Triangle
A triangle which has two congruent sides
Isosceles Triangle
A triangle with three congruent sides
Equilateral Triangle
Lines that stay same distance from each other forever and never intersect
Parallel lines
A transformation that moves a figure by turning it
Rotation
An angle that is more that 90 degree and less that 180 degree
Obtuse angle
An angle that is less than 90 degree
Acute angle
Two angles that add up to 90 degrees
Complementary angles
Lines that cross at a point and form 90 degree angles
Perpendicular lines
The angles on the outside of a figure when the sides are extended
Exterior Angles
Contains two sets of parallel sides that form four 90 degree angles
Rectangle, Square
Contains two sets of parallel sides
Parallelogram, square, rectangle, rhombus
Two angles that add up to 180 degree
Supplementary Angles
A figure has this when a line can divide it into two congruent parts
Line Symmetry
A word meaning equal or same; it is used to describe figures, sides, and angles
Congruent
A quadrilateral with no parallel sides
Trapezium or Trapezoid, Kite
A quadrilateral that contains one set of parallel sides; also contains two opposite congruent sides
Isosceles Trapezoid
A line segment from the center of a circle to any point on the circle. Its length is half of the diameter.
Radius