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UNIT I
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Gravity
Terms in this set (24)
cone
A three dimensional shape with a circular base and a vertex opposite the base
cross section
A transverse section.
cylinder
A solid composed of two congruent circles in parallel planes, their interiors, and all the line segments parallel to the axis with endpoints on the two circles.
face
a flat (planar) surface that forms part of the boundary of a solid object; a three-dimensional solid bounded exclusively by flat faces is a polyhedron.
polyhedron
a solid figure bounded by plane polygons or faces
prism
A solid figure that has two congruent, parallel polygons as its bases. Its sides are parallelograms
pyramid
A solid shape with a polygon as a base and triangular faces that come to a point (vertex or apex)
surface area
1. The sum of all the areas of all the faces or surfaces that enclose a solid. 2. The sum of all the areas of all surfaces of a solid.
similar solids
solids with the same shape and all their corresponding dimensions are proportional
sphere
A solid shape that is perfectly round like a ball. No faces, edges, or vertices.
volume
the measure of the amount of space inside of a solid figure, like a cube, ball, cylinder or pyramid. It's units are always "cubic", that is, the number of little element cubes that fit inside the figure.
area of a circle
A=πr²
circumference
The distance around a circle
volume of a cylinder
V=πr²h
volume of a square pyramid
1/3 hLw
volume of a pyramid
V=1/3Bh
volume of a cone
1/3Bh
volume of a sphere
4/3πr³
density
Mass / Volume
area
Length x Width
volume
the measure of the amount of space inside of a solid figure, like a cube, ball, cylinder or pyramid. It's units are always "cubic", that is, the number of little element cubes that fit inside the figure.
perimeter
The distance around a figure
dissection
the problem of partitioning a geometric figure (such as a polytope or ball) into smaller pieces that may be rearranged into a new figure of equal content.
cavalieris principle
says that if two three-dimensinoal figures have the same height and have the same cross-sectional area at every level, they have the same volume
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