40 terms

volume

A measure of how much space a solid (3-dimensional) object takes up OR how much a container will hold.

units³

Volume is measured in cubic units.

area

The amount of surface inside a closed figure.

units²

Area is measured in squared units.

perimeter

The distance around a 2-dimensional shape - the outside "rim" of the shape.

reflection

The "flipping" of a figure over a line so that its image is the mirror image of the original figure.

area of a triangle

A = ½ ** b *** h

area of a rectangle OR parallelogram

A = b * h

volume of a prism

V = B * h where "B" is the area of the base of the prism and "h" is the height of the prism

acute angle

an angle less than 90 degrees but more than 0 degrees

obtuse angle

an angle that measures more than 90 degrees but less than 180 degrees

right angle

an angle that measures exactly 90 degrees

reflex angle

an angle greater than 180 degrees (but less than 360)

base

the bottom side of a geometric figure

determine

reach, make, or come to a decision about something

dimension

the measurements of an object's length, width, and height

function machine

An imaginary machine used in MATHEMATICS to change numbers according to a given rule.

evaluate

solve (find the answer); judge

linear

measured lengthwise

symmetry

exact correspondence of form on opposite sides of a dividing line

equilateral triangle

a triangle with three congruent/equal sides

isosceles triangle

A triangle with at least two congruent sides

obtuse triangle

a triangle with one interior obtuse angle

right triangle

a triangle with one right angle

variable

a letter that represents one or more numbers that can be changed

polygon

A closed plane figure made up of line segments with many (poly) angles (three or more)

pentagon

a five-sided polygon

octagon

An eight-sided polygon

hexagon

a six-sided polygon

congruent

same shape and same size

trapezoid

a quadrilateral with two parallel sides

vertex

The common endpoint of an angle

rhombus

A rhombus is a quadrilateral whose sides are all the same length (congruent) and whose opposite interior angles are the same size (congruent.) Really, a ________ is just a square that someone sat on and squished! (ouch)

quadrilateral

a polygon with 4 sides

point

A precise location or place on a plane. Usually represented by a dot.

parallelogram

Opposite angles of a __________ are the same size/measure (congruent.)

Opposite sides of a __________ are parallel... Uh... You think that's where it got it's name? This is a rectangle that a giant sat on and squished.

Opposite sides of a __________ are parallel... Uh... You think that's where it got it's name? This is a rectangle that a giant sat on and squished.

parallel

Two lines (lying in the same plane) are parallel if they never intersect... This means that the two lines are always the same distance apart. Lines that will never meet, no matter how long you stretch them (like railroad tracks!)

line segment

a part of a line that has two endpoints

line

a straight path that extends without end in opposite directions

intersecting lines

lines that cross at one point