Geometry & Volume Flashcards
Polygon
a closed plane figure formed by three or more line segments
Regular Polygon
A polygon in which all sides are congruent and all angles are congruent
Equilateral Triangle
A triangle with three congruent sides
Isosceles Triangle
A triangle with two congruent sides
Scalene Triangle
A triangle with no congruent sides
Acute Triangle
A triangle that has here acute angles
Obtuse Triangle
A triangle that has one obtuse angle
Right Triangle
A triangle that has a right angle
Triangle
A polygon with three sides and three angles
Quadrilateral
A polygon with four sides and four angles
Pentagon
A polygon with five sided and five angles
Hexagon
A polygon with six sides and six angles
Heptagon
A polygon with seven sides and seven angles
Octagon
a polygon with eighth angles and eight sides.
Nonagon
a polygon having nine angles and nine sides.
Decagon
a polygon having ten angles and ten sides.
Congruent
Having the same size and shape
Parallel Lines
Lines in the same plane that never intersect and are always the same distance apart
Perpendicular Lines
Two lines that intersect to form four right angles
Parallelogram
A quadrilateral whose opposite sides are parallel and have the same length or are congruent
Rectangle
a parallelogram with four right angles
Rhombus
a parallelogram with four equal, or congruent, sides
Trapezoid
A quadrilateral with exactly one pair of parallel sides
Base
A number used as a repeated factor
Decagonal prism
A three-dimensional figure with two decagonal bases and ten rectangular faces
Hexagonal prism
A three-dimensional figure with two hexagonal bases and six rectangular faces
Octagonal prism
A three-dimensional figure with two octagonal bases and eight rectangular faces
Pentagonal prism
A three-dimensional figure with two pentagonal bases and five rectangular faces
Pentagonal pyramid
A pyramid with a pentagonal base and five rectangular faces
Polyhedron
A solid figure with faces that are polygons
Lateral face
Any surface of a polyhedron other than a base
Prism
A solid figure that has two congruent, polygon-shaped bases, and other faces that are all rectangles
Pyramid
A solid figure with a polygon base and all other faces are triangles that meet at a common vertex
Unit cube
A cube that has a length, width, and a height of 1 unit
Cubic unit
A unit used to measure volume such as cubic foot (ft3), cubic meter (m3), and so on
Volume
The measure of the space a solid figure occupies
