Browse Media Learn More

Free Membership - Access to more than just media

Families and school personnel (including those in training) who have at least one student with a disability can sign up for free membership.

Accessible Media

Standards-aligned videos with high-quality captions and audio description.

Teaching Tools

Create lessons and assign videos to managed Student Accounts.

Training Videos

Educator and sign language training videos for school personnel and families.
Learning Center

Find resources for providing equal access in the classroom, making media accessible, and maximizing your use of DCMP's free services.
Visit Learning Center

Accessibility Information

DCMP's Learning Center provides hundreds of articles on topics such as remote learning, transition, blindness, ASL, topic playlists, and topics for parents.

See All

Accessibility Guidelines

DCMP offers the only guidelines developed for captioning and describing educational media, used worldwide.
Captioning Key
Description Key

Help Center

Learn how to apply for membership, find and view accessible media, and use DCMP’s teaching tools.
Help Center
Continuing Education and Professional Development

DCMP offers several online courses, including many that offer RID and ACVREP credit. Courses for students are also available.
See All eLearning Resources

QuickClasses

Asynchronous, online classes for professionals working with students who are deaf, hard of hearing, blind, low vision, or deaf-blind.

See QuickClasses

Workshops

For interpreters, audio describers, parents, and educators working with students who are hard of hearing, low vision, and deaf-blind.
See Workshops

Modules

Modules are self-paced, online trainings designed for professionals, open to eLearners and full members.
See Modules

Students

These self-paced, online learning modules cover the topics of transition, note-taking, and learning about audio description.

See Student Courses
Make your educational content accessible and broadly available.

DCMP can add captions, audio description, and sign language interpretation to your educational videos and E/I programming.
Learn More

Accessibility

Captions are essential for viewers who are deaf and hard of hearing, and audio description makes visual content accessible for the blind and visually impaired.

Distribution

DCMP can ensure that your content is always accessible and always available to children with disabilities through our secure streaming platforms.

Meet our partners

DCMP partners with top creators and distributors of educational content. Take a look
About the Described and Captioned Media Program

The DCMP provides services designed to support and improve the academic achievement of students with disabilities. We partner with top educational and television content creators and distributors to make media accessible and available to these students.
Contact Us
Services

Captioning, audio description, and ASL services

Professional training for school personnel

Distribution of fully accessible streaming media

Projects

Media Center

Television Access

We Describe the World

YouTube Audio Description

Privacy and TOS

Privacy Statement

Terms of Service

Accessibility Policy

Mission and Funding

Read More

Zero the Math Hero: Finding Triangle Measures

18 minutes 36 seconds

3:42 Preview

Apply for Free Membership

Videos are generally available for preview to non-members as short clips. Limited full-length titles are also available. Log In to view the full length title.

Browse Full-length Non-member Titles

In this 12-part series, Zero the Math Hero introduces the concept of a theorem and models how to find angle measures for interior and exterior angles for a variety of triangles. Several examples are demonstrated, using algebra as a part of the problem solving process. Students will learn two theorems related to triangles are: The Triangle Angle-Sum Theorem, and The Exterior Angle Theorem. Part of the "Zero the Math Hero" series.

Media Details

Runtime: 18 minutes 36 seconds

Topic: Mathematics
Subtopic: Geometry, Mathematics
Grade/Interest Level: 6 - 9
Standards:

Release Year: 2012
Producer/Distributor: TMW Media Group
Series: Zero the Math Hero
Report a Problem

Members Only - Apply Now

Zero the Math Hero, a man in black costume with a black cape and mask, holds up his left hand while talking in front of a beige background. Caption. We can think of a point as a specific location.

Zero the Math Hero talking. A black line with 2 arrows and points on either side marked A and B is above green text that reads, "Segment. A part of a line with 2 endpoints." Caption. We can define a line segment as.

Zero the Math Hero talking in front of a line with 2 arrows and 3 points marked A, B, and C. Green text on screen reads, "Coordinate. The number for a point on a number line." Caption. We're going to find the length of some of these segments here.

Zero the Math Hero leans forward in front of a dry erase marker drawing of the Eiffel Tower with green hills behind it. Caption. Sometimes it's known as the Cartesian coordinate system.

Zero the Math Hero walks to the left while smiling and holding a red flag with white writing. Caption. Be right back.

Zero the Math Hero wears a pirate hat in front of a dry erase marker drawing of a tiny island with a single palm tree. Caption. I also have other tricks in me measure chest.

Scalene right triangle next to Zero the Math Hero. The longest line is labeled, "hypotenuse, C." Caption. Here, we use the variable C to represent its length.

Zero the Math Hero wears a tan cowboy hat and blue overalls and holds a pitchfork while standing in a wheat field with tall trees behind it. Caption. See you back at Studio Z, math fans.

Black rectangle with labels showing the shorter sides are 6 meters in length and the longer sides are 10 meters. Zero the Math Hero stands to the right of it. Caption. For instance, this rectangle's perimeter could have been found.

Zero the Math Hero holds up a tan acoustic guitar in front of a beige background. Caption. I'm sensing that you're not sure you're up for this challenge.