Use informal arguments to establish facts about the angle sum and exterior angle of triangles, about the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles.
Standard detail
CCSS.Math.Content.8.G.A.5
Standard
Depth 2Parent ID: D0EB514856494855B13AC65FF9348E7AStandard set: Grade 8
Original statement
Quick facts
- Statement code
- CCSS.Math.Content.8.G.A.5
- List ID
- 5.
- Standard ID
- 92B2C01F6DE34EB2ACF6162770041427
- ASN identifier
- S2526041
- Subject
- Mathematics (2010-2014)
- Grades
- 08
- Ancestor IDs
- D0EB514856494855B13AC65FF9348E7ADC315B896F374472BC17D8B7BA058028
- Exact matches
- Source document
- TN Common Core State Standards for Mathematics (2010)
- License
- CC BY 3.0 US
- Dataset notes
For example, arrange three copies of the same triangle so that the sum of the three angles appears to form a line, and give an argument in terms of transversals why this is so.