Spanish (SP)
French (FR)
Portuguese (PT)
* = Cognate
Words and Phrases 
Academic Language Meaning 
Everyday Language Version 
Other Forms of the Word or Phrase 
Related Words or Phrases 
Translation 
Examples of word use with students 
Polygon 
A geometric figure formed from three or more points joined by three or more line segments. 
 
Polygons Polygonal 
Shape 2D figure 
*Polígono (SP) *Polygone (FR) *Polígono (PT) 

Area

The number of square units contained in the interior of a figure; the extent of a twodimensional surface enclosed within a boundary 
The space something occupies, twodimensional 
 
Enclosed Space
Twodimensional size

*Area (SP) *Aire/ Superficie (FR) *Área (PT) 

Vertices 
The points where the sides of a geometric figure intersect. 

Vertex 
Intersection Corner 
*Vértices (SP) Sommets (FR) *Vértices (PT) 

Triangle 
A polygon with exactly three sides. 
 
Triangles Triangular

Isosceles Equilateral Scalene

*Triángulo (SP) *Triangle (FR) *Triângulo (PT) 

Convincing 
Persuading or assuring by argument or evidence 
Causing one to believe the truth of something; plausible 
Convince Convinced Convincingly Convincer Convincible

Persuasive Believable Credible Plausible 
*Convincente (SP) *Convaincant(e) (FR) *Convincente (PT) 

Right Triangle 
A triangle in which one interior angle is a right angle, that is, 90 degrees. The other two angles are complementary, which means that they add up to 90 degrees. 
A triangle having a right angle. 
Right Triangles Right Triangular 
 
Triángulo Rectángulo (SP) Triangle Rectangle (FR) Triângulo Retângulo (PT) 

Coordinates

A set of numbers that describe locations in space. 
Points on a grid. 
Coordinate Coordinated Coordinating

Locations on a plane. Locations on a plane. Latitude Longitude

*Coordenadas (SP) *Coordonnées (FR) *Coordenadas (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) 

Subtract

To calculate the difference between numbers or quantities 
To withdraw or take away; to remove a part from a whole. 
Subtracted Subtracting Subtracts Subtraction 
Decrease Take away Remove

Restar/ *Sustraer (formal) (SP) *Soustraire/ Déduire (FR) *Subtrair (PT) 

Remove 
 
To take, or move away from an occupied place or position; To eliminate. 
Removed Removing Removes 
Take away Subtract Eliminate Erase Withdraw

*Remover/ Quitar (SP) Retirer (FR) *Remover (PT) 

Count 
To calculate the numbers of objects in a group. 
To recite numbers in ascending order. 
Counts Counting Counted 
Tally Number Enumerate 
*Contar (SP) *Compter (FR) *Contar (PT) 

Rectangle 
A parallelogram with four right angles 
 
Rectangular Rectangles

Parallelogram Quadrilateral Quadrangle 
*Rectángulo (SP) *Rectangle (FR) *Retângulo (PT)

