Common Core
G-CO.C.9
5 lessons teach this standard. Every lesson is interactive, and every one prints as a worksheet with a separate answer key.
Geometry · Chapter 1 · Lesson 2
Angle Pairs and Parallel Lines
A transversal makes eight angles and only two sizes.
Geometry · Chapter 3 · Lesson 2
Every claim carries its reason.
Integrated Math 2 · Chapter 7 · Lesson 1
Inductive and Deductive Reasoning
How a pattern becomes a conjecture, and a conjecture becomes a theorem.
Integrated Math 2 · Chapter 7 · Lesson 2
The results a proof is built from.