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: 8923B07917F840D5AC5667900B84B855Standard set: Grade 8
Original statement
Quick facts
- Statement code
- CCSS.Math.Content.8.G.A.5
- List ID
- 5.
- Standard ID
- 53FA09BF3012465FB9CD5C3035184F6E
- ASN identifier
- S2554267
- Subject
- Mathematics (2010-)
- Grades
- 08
- Ancestor IDs
- 8923B07917F840D5AC5667900B84B85523FCA2FCBDA14EB89575F923EA3C37A0
- Exact matches
- Source document
- New Mexico 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.