Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

60 Cards in this Set

  • Front
  • Back
No definition
No definition
no definition
Collinear points
Points that lie on the same line
Coplanar points
Points that lie on the same plane
set of all possible points
Line segment
A set of two points and all the collinear points between them
Part of a line consisting of a single point and all points on that line that lie on the same side of the original point
the union of two non collinear rays with a common end point
Right angle
An angle whose measure is 90 degrees
Acute angle
and angle whose measure is less than 90 degrees but more than 0
Obtuse angle
an angle whose measure is more than 90 degrees and less 180
Midpoint of a segment
A point that divides a segment into two equal parts
angle bisector
a line or ray that divides an angle into two equal parts
parallel lines
two or more lines that are coplanar and do not intersect
Skew lines
non coplanar lines
Parallel segments
two segments are parallel if the lines that contain them are parallel
Parallel rays
Two rays are parallel if the lines that contain them are parallel
Perpendicular lines
Lines that intersect to form a right angle
A pair of complementary angles
two angles whose sum is 90 degrees
a pair of supplementary angles
two angles whose sum is 180 degrees
Vertical angles
two adjacent angles formed by to intersecting lines
Linear pair of angles
two adjacent angles whose non common sides form a striaght line
a closed geometric figure in a plane, formed by connecting line segments endpoint to endpoint with each segment intersecting exactly two others
concave polygon
one in which there is a line that contains on of the sides but passes through the interior
convex polygon
one that is not concave
a 3 sided polygon
a 4 sided polygon
a 5 sided polygon
a 6 sided polygon
a 7 sided polygon
an 8 sided polygon
a 9 sided polygon
a 10 sided polygon
an 11 sided polygon
a 12 sided polygon
a 20 sided polygon
Consecutive verices of a polygon
two vertices that are endpoints of the same side
consective sides of a polygon
two lines that intersect at the same vertex
consecutive angles
two angles whose veritices are the endpoints of a side
adjacent angles
two angles with a common side and a common vertex
Diagonals of a polygon
a line segment connecting two non consecutive vertices
Equilateral polygon
a polygon whose sides are all congruent
Equiangular polygon
a polygon whose angles are all congruent
Regular polygon
A polygon that is equilateral and eqiangular
Right triangle
a triangle that has exactly one right angle
acute triangle
a triangle where all angles are acute
obtuse triangle
a triangle where exactly one angle is obtuse
scalene triangle
a triangle with no congruent sides
Isosceles triangle
a triangle with at least two equal sides
median of a triangle
a line segment with one endpoint at a vertex and the other endpoint at the midpoint of the opposite side
Altitude of a triangle
A line segment from a vertex that is perpendicular to the line containing the opposite side
a quadrilateral with e xactly one set of parallel sides
Isosceles trapezoid
A trapezoid with congruent legs
A quadrilateral with two distinct sets of consecutive congruent sides
right kite
A kite whose non vertex angles are right angles
a quadrilateral with two sets of parallel sides
An equilateral quadrilateral
an equiangular quadrilateral
a regular quadrilateral