Rays and Angles -- Introduction

Words to Know

• line segment
• ray
• angle
• linear pair
• vertical angles
• opposite rays
• vertex
• sides of an angle
  

IFF means if and only if

By the way, here is a geometry vocabulary list with links to definitions.

Try:

This Lines, Rays and Angles Quiz
Look at demonstration of collinear

Do

SET I: #4-14, 19-21
SET II: #27-32, #34