2D Shapes Vocabulary
Essential 2D Shapes Vocabulary List circle triangle square pentagon hexagon octagon decagon 2-Dimensional
Angles and Lines Vocabulary
Essential Angles & Lines Vocabulary List angle right angle acute angle obtuse angle straight angle degrees line line segment ray horizontal vertical perpendicular parallel congruent intersecting lines protractor point vertex arc circle plane complementary angles supplementary angles polygon
Triangle Vocabulary
Here is a list of important triangle vocabulary for elementary school. triangle angle isosceles scalene equilateral acute obtuse right