elem math test 3

unit of measurement

standardized definite magnitude of a quantity

area

the region bounded by a closed curve in a plane

kilo, hecto, deca, meter, deci, centi, milli, micro

1000, 100, 10, 1, 0.1, 0.01, 0.001, 0.0000001

liter

the volume of a cube, each of whose sides is 10cm

weight

the force exerted by gravity

mass

the amount of matter in an object

perimeter

the length of a region in a plane’s boundary

area

the number of units that it takes to cover the region

pythagorean theorem

if a right triangle has legs of length a and b and its hypotensue has length c, then a² + b² = c²

Converse of pythagorean theorem

in a triangle if the three sides have the relationship a² + b² = c², then it is a right triangle

surface area

the total area needed to cover the boundary of a 3D shape

volume

the amount of 3D space enclosed within the boundary