http://www.harcourtschool.com/glossary/math04/index4.html

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Geometry Vocabulary

Click on each of these terms to see the defintion, an illustration, and sometimes an animation. There are too many words to learn in one day. Try to remember as many as you can. We will be using these words throughout the geometry unit. After reading each definition, close the window to return to this page. Read each definition and look at the illustrations at least twice before trying the activities at the bottom of the page.

point	line	line segment	ray
angle	right angle	acute angle	obtuse angle
vertex	parallel line	perpendicular lines	intersecting lines
circle	circumference	chord	diameter
radius	triangle	right triangle	acute triangle
obtuse triangle	equilateral triangle	isosceles triangle	scalene triangle
polygon	parallelogram	quadrilateral	rectangle
square	trapezoid	hexagon	octagon
pentagon	closed figure

These activities will help you learn geometry vocabulary:

• Geometry Math-O
• Geometry Hidden Picture
• Geometry Flashcard
• Geometry Terms Games
• Geometry Crossword
• Lines, Rays & Angles Quiz

Geometry Table of Contents

Check out the link below for online flash cards