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: C0C985F7FFE7423D835C537871E191F5Standard set: Grade 8
Original statement
Quick facts
- Statement code
- CCSS.Math.Content.8.G.A.5
- List ID
- 5.
- Standard ID
- 548E34BC57CC4F3D9DBEE60D82B192A2
- ASN identifier
- S1143541
- Subject
- Common Core Mathematics
- Grades
- 08
- Ancestor IDs
- C0C985F7FFE7423D835C537871E191F5D1CF1180DFE401311D0D68A86D17958E
- Source document
- 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.