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Gravity
Terms in this set (46)
Plane
A flat surface that stretches into infinity
Point
A location in a plane or in space, having no dimensions
Line
straight set of points that expand to infinity in both sides
Line segment
Two points on a line end's that does not strech
Ray
part of a line, with one endpoint, and extending to infinity in one direction.
Intersecting lines
Lines that have only one point in common and make acute and obtuse angles
Parallel Lines
Two lines are parallel if they are in the same plane and never intersect
Perpendicular lines
Two lines are perpendicular if the angle between them is 90 degrees
Angle
The union of two rays with a common endpoint, called the vertex
Right angle
An angle whose measure is 90 degrees
Acute angle
An angle measuring less than 90 degrees
Obtuse angle
An angle whose measure is greater than 90 degrees Less than 180
Straight angle
An angle that measures 180 degrees
Polygon
A closed plane figure made up of several line segments that are joined together. (no curved sides)
square
Any four-sided figure is called a quadrilateral
Parallelogram
A quadrilateral with opposite sides parallel
Rectangle
A parallelogram with four 90-degree (right) angles
Square
A parallelogram with four congruent (equal) sides and four 90 degree (right) angles
Rectangle
A parallelogram with four 90-degree (right) angles
Rhombus
A parallelogram with four congruent (equal) sides.
Opposite angles are congruent.
Congruent
Figures with the same size, same shape
Trapezoid
A quadrilateral that has exactly one pair of parallel sides.
The parallel sides are called bases.
Regular polygon
A polygon with congruent (equal) sides and angles
Irregular polygon
A polygon with unequal sides and angles
pentagon
a polygon with
• 5 sides
• 5 angles
• 5 vertices
Hexagon
a polygon with
• 6 sides
• 6 angles
• 6 vertices
octagon
a polygon with
• 8 sides
• 8 angles
• 8 vertices
circle
the set of all points that lie the same distance from the center (C) and lie in the same plane
Face
the flat surface of a three-dimensional figure
Edge
a line segment where two faces meet on a three-dimensional figure
Vertex
the point (corner) of intersection of three or
more edges of a three-dimensional figure
Three dimensional figure
a figure with three units of measure
• length
• width (depth)
• height
Cylinder
three-dimensional figure with
• two congruent circular bases that are parallel
• 1 curved surface
Sphere
three-dimensional figure with all of its points the same distance from its center
Cone
three-dimensional figure with
• 1 circular base
• 1 curved surface
Prism
three-dimensional figure with
• two congruent, parallel faces (bases)
• sides that are polygonal faces
Triangular prism
three-dimensional figure with
• 5 faces
— 2 triangular faces (bases)
— 3 rectangular faces
• 9 edges
• 6 vertices
Rectangular prism
three-dimensional figure with
• 6 rectangular faces
— 2 rectangular faces (bases)
— 4 other rectangular faces
• 12 edges
• 8 vertices
Cube
three-dimensional figure with
• 6 square faces
— 2 square faces (bases)
— 4 other square faces
• 12 edges
• 8 vertices
Pentagonal prism
three-dimensional figure with
• 7 faces
— 2 pentagonal faces (bases)
— 5 rectangular faces
• 15 edges
• 10 vertices
Hexagonal prism
three-dimensional figure with
• 8 faces
— 2 hexagonal faces (bases)
— 6 rectangular faces
• 18 edges
• 12 vertices
Pyramid
three-dimensional figure with
• 1 face (base)
• sides that are triangular faces
Triangular pyramid
three-dimensional figure with
• 4 triangular faces
— 1 triangular face (base)
— 3 other triangular faces
• 6 edges
• 4 vertices
Square pyramid
three-dimensional figure with
• 5 faces
— 1 square face (base)
— 4 triangular faces
• 8 edges
• 5 vertices
Rectangular pyramid
three-dimensional figure with
• 5 faces
— 1 rectangular face (base)
— 4 triangular faces
• 8 edges
• 5 vertices
Pentagonal pyramid
three-dimensional figure with
• 6 faces
— 1 pentagonal face (base)
— 5 triangular faces
• 10 edges
• 6 vertices
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