Spanish (SP)
French (FR)
Portuguese (PT)
* = Cognate
Words and Phrases 
Academic Language Version 
Everyday Language Meaning 
Other Forms of the Word or Phrase 
Related Words or Phrases 
Translation

Examples of word use with students 
Construct 
To create new elements with previously measured or constructed elements. 
To build; to assemble.
To put something together. 
Constructing Constructed Constructs 
Build Make Create Form To put together 
*Construir (SP) *Construire (FR) *Construir (PT) 

Perpendicular 
Intersecting at or forming right angles
A line or plane that intersects another line or plane at a right angle 
A line or plane that comes together to form a square angle, a 90degree angle.

Perpendicularity Perpendicularly 
Vertical Upright Straight up

*Perpendicular (SP) *Perpendiculaire (FR) *Perpendicular (PT) 

Parallel 
Designating two or more coplanar lines that do not intersect 
Having the same tendency or direction.
Being an equal distance apart everywhere.
Never intersecting. 
Paralleled Paralleling Parallels 
Parallelogram Equidistant In the same direction 
*Paralelo(a) (SP) *Parallèle (FR) *Paralelo(a) (PT) 

Angles 
Shape formed by two straight lines or surfaces that meet 
a corner; a shape formed by two lines meeting at a point. 
Angle Angled Angling Angular 
Corner

*Ángulo (SP) *Angle (FR) *Ångulo (PT) 

Intersection 
A point or locus of points where one line, surface, or solid crosses another; set that contains elements shared by two or more sets 
A road junction; a place where two or more things come together 
Intersecting intersect intersected 
Crossroads Junction Meeting point

*Intersección (SP) *Intersection (FR) *Interseção (PT) 

Bisector 
A figure (line, ray) that divides into two equal parts. 
Cuts or splits into two. 
Bisect Bisection Bisects Bisectional

Break in two Cut in half Split evenly 
*Bisectriz (SP) *Bissectrice (FR) *Bissetriz (PT) 

Midpoint 
A point on a line segment that divides it into two equal parts The halfway point of a line segment

A point at the center or middle. 
Midpoints

Center Middle Halfway point Midway 
*Punto medio (SP) *Point médian (FR) Ponto central (PT)


Isosceles Triangle

A triangle that has two equal sides. The angles opposite these sides are also equal. 
A triangle with two equal sides. 
 
 
Triángulo isosceles (SP) Triangle isocèle (FR) Triångulo isósceles (PT) 

Equilateral Triangle 
A triangle with all three sides of equal length and whose angles are all 60 degrees. 
A triangle with all three sides of equal length. 
 
 
*Triángulo equilátero (SP) *Triangle équilatérale (FR) *Triângulo equilátero (PT) 

‘Patty Paper’ 
Waxed squares of paper used by students to discover geometric properties by tracing and folding. 
Waxed squares of paper used by restaurants and butchers to separate meat. 
 
Tracing paper 
Papel de cera (wax) (SP) Papel de hamburguesa (SP) Papel de calcar (tracing paper) (SP)
Papier de cire (wax) (FR) Papier de steak haché (FR) Papier Calque (FR) (tracing paper)
Papel de cera (wax) (PT) Papel de hambúrguer (PT) Papel Vegetal (PT) (tracing paper)


Half 
Either of two equal parts of a whole.
Either of two equal parts, which together compose a value twice as large as either one of the halves. 
One of two equal parts; 50%;

Halves Halved 
Split in two Split down the middle Bisected Divide equally in two 
Mitad (SP) Moitié (FR) Metade (PT) 

Square 
A 4sided regular polygon with all sides equal and all internal angles 90 degrees; twodimensional 
A rectangle with all four sides equal 
Squares Squarely 
Equal sides Congruent sides

Cuadrado (SP) Carré (FR) Quadrado (PT) 

Line Segment 
A straight line that links two points without extending beyond them. 
Unbroken and bounded portion of line. 
Segmented line Line segments Segmenting lines

Part of line Portion of line Section of line

*Segmento de línea (SP) *Segment (FR) *Segmento de linha (PT)

