Standard #: MA.8.GR.1.5


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Solve problems involving the relationships of interior and exterior angles of a triangle.


Clarifications


Clarification 1: Problems include using the Triangle Sum Theorem and representing angle measures as algebraic expressions.

Related Courses

Course Number1111 Course Title222
1205050: M/J Accelerated Mathematics Grade 7 (Specifically in versions: 2014 - 2015, 2015 - 2020, 2020 - 2022, 2022 and beyond (current))
1205070: M/J Grade 8 Pre-Algebra (Specifically in versions: 2014 - 2015, 2015 - 2022, 2022 and beyond (current))
1204000: M/J Foundational Skills in Mathematics 6-8 (Specifically in versions: 2014 - 2015, 2015 - 2022, 2022 and beyond (current))
7812030: Access M/J Grade 8 Pre-Algebra (Specifically in versions: 2014 - 2015, 2015 - 2018, 2018 - 2019, 2019 - 2022, 2022 and beyond (current))


Related Access Points

Access Point Number Access Point Title
MA.8.GR.1.AP.5 Given an image, solve simple problems involving the relationships of interior and exterior angles of a triangle.


Related Resources

Formative Assessment

Name Description
Justifying the Exterior Angle of a Triangle Theorem

Students are asked to apply the Exterior Angle of a Triangle Theorem and provide an informal justification.

Lesson Plan

Name Description
Triangles: Finding Interior Angle Measures

The lesson begins with a hands-on activity and then an experiment with a GeoGebra-based computer model to discover the Triangle Angle Sum Theorem. The students write and solve equations to find missing angle measures in a variety of examples.

Tutorial

Name Description
Finding Missing Angle Measures

In this video, we find missing angle measures from a variety of examples.

 

Student Resources

Tutorial

Name Description
Finding Missing Angle Measures:

In this video, we find missing angle measures from a variety of examples.

 



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