Use Sophia to knock out your gen-ed requirements quickly and affordably.
Learn more
Sign In
Help
Become a Member
Try for Free
Sign In
Password
Sign In
Forgot your Password?
Create an Account
Let's chat
Or
Close Popup
First, please create an account
Already have a Sophia account?
Sign in
Email Address
Password
Confirm Password
By providing your information, you consent to receive occasional special promotional offers and education opportunities by phone, text message, and email via automated technology from Sophia Learning or one of its affiliates. Consent is not required to purchase goods or services. You can always call us at 1-800-341-0327. See our
privacy policy.
See our most recent
privacy notice.
Create Account
×
Interior/Exterior Angles and Angles of Polygons
Author:
Brian Wickenheiser
Finding the Missing Angles in Triangles
Source: Khan Academy from YouTube
Sum of Angles in Polygons
Source: Khan Academy from YouTube
Interior Angles of Polygons
/
More Information
Less Information
Close
Classifying Triangles
/
More Information
Less Information
Close
Source: Scott Foresman Math Textbook