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54 Cards in this Set

  • Front
  • Back
Point
A position in space that has no dimension
Line
A never ending straight path
Ray
(a line with) 1 endpoint
Line Segment
(a piece of a line with) 2 endpoints
Intersecting Line
2 lines that meet at 1 point
Perpendicular Line
Lines that meet to form a right angle
Plane
A flat surface that extends in all directions
Parallel Lines
Lines on the same plane that will never meet
Skew Lines
Lines not in the same plane that will never meet
Right Angle
90º
Acute Angle
>90º
Angle
A figure formed by 2 rays extending from 1 vertex
Obtuse Angle
<90º but >180º
Straight Angle
180º
Reflex Angle
<180º
Adjacent Angles
Angles that share a common vertex and a common ray
Vertex
A point in an angle where 2 rays meet
Vertical Angle
2 non-adjacent angles formed when 2 lines intersect

They are Congruent
Corresponding Angles
Angles that match in position when a parallel lines are cut by a transversal

They are congruent
Alternate Interior Angles
They are congruent
Alternate Exterior Angle
They are congruent
Complementary Angles
2 angles whose sum is 90º
Supplementary Angles
2 angles whose sum is 90º
Transversal
A line that intersects 2 angles
Equilateral Triangle
A triangle with all sides and angles congruent.

All angles 60º
Isosceles Triangle
A triangle with at least 2 congruent sides

2 equal angles on the different sides are congruent
Scalene Triangle
A triangle with no congruent sides
Right Triangle
A triangle with 1 right angle
Obtuse Triangle
A triangle with 1 obtuse angle
Acute Angle
A triangle with 3 acute angles
Equilateral Triangle
A triangle with all sides and angles congruent
Polygon
A many sided figure
Triangle
A three sided figure
Quadrilateral
A 4 sided figure

360º
Pentagon
A 5 sided figure

540º
Hexagon
A 6 sided figure

720º
Septagon
or
Heptagon
A 7 sided figure

900º
Octagon
An 8 sided figure

1080º
Nonagon
A 9 sided figure

1260º
Decagon
A 10 sided figure

1440º
Dodecagon
A 10 sided figure

1620º
A Regular Polygon
A sides and angles the same
Parallelogram
A quadrilateral 2 pairs of parallel sides
Rectangle
A parallelogram with a right angle
Rhombus
A parallelogram congruent sides

There are no right angles
Square
A special Rectangle
with congruent sides
A Special Rhombus
with 1 right Angle
Trapeziod
A Quadrilateral with exactly 1 pair of parallel sides
Kite
Quadrilateral with 2 pairs of adjacent and congruent sides
Circle
A plane with all parts equidistant from a given point called the center
Diameter
A chord that passes the center of the circle

2 radius
Radius
A line segment that connects the center and any point on the circle
Central Angle
An angle whose vertex is the center of the circle and whose rays contain the radii of of the circle
Inscribe Angle
an angle whose vertex lies on the circle and whose rays contain chords of the circle
Intercepted Arc
A piece of the circle between the two rays