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math
Question  Answer  Question  Answer 

acute angle  angle less than 90 degrees  
obtuse angle  angle greater than 90 degrees  
right angle  angle equaling 90 degrees  
acute triangle  triangle with all acute angles  
obtuse triangle  triangle with one obtuse angle  
right triangle  triangle with one right angle  
scalene triangle  triangles whose sides are all different measures  
isosceles triangle  triangle with two sides that are congruent  
equilateral triangle  triangle with all three sides congruent  
equiangular triangle  triangle with three congruent angles  
The measure of an angle in an equilateral or equiangular triangle  60 degrees  
The sum of all angles in a triangle  180 degrees  
exterior angle of a triangle  angle formed by one side of a triangle and the extension of another side  
remote interior angles  interior angles not adjacent to a given exterior angle  
congruent triangles  triangles that have corresponding parts congruent  
congruence transformations  occurs when a slide  flip  or turn of a triangle does not change the size or shape 
included angle  angle formed by two sides of a triangle  
SSS Postulate  If the sides of one triangle are congruent to the sides of another triangle  then the two triangles are congruent.  
SAS Postulate  If two sides of a triangle and their included angle are congruent to two sides of another triangles and their included angle  then the triangles are congruent.  
included side  the side between two angles of a triangle  
ASA Postulate  If two angles and the included side of one triangle are congruent to two angles and the included side of another triangle  then the two triangles are congruent.  
AAS Postulate  If two angles and a nonincluded side of one triangle are congruent to the corresponding angles and side of a second triangle  then the two triangles are congruent.  
SSA Postulate  a valid test of congruence for right triangles  
base angles  two angles formed by the base and the congruent sides of an isosceles triangle  
vertex angle  angle formed by the two congruent sides of an isosceles triangle  
coordinate proof  uses figures in the coordinate plane and algebra to prove geometric concepts 
Created by:
Elive