Academic Context and Connections
Finer grained standards that are part of this one
This expectation represents major work of high school.
Can some theorems be proved without using other, previously proven theorems? If so, what does that imply about a system of theorems?
Attend to precision.
Construct viable arguments and critique the reasoning of others.
In Grades 7 and 8, students investigate properties of lines and angles, triangles, and parallelograms.
In high school, proof is sometimes formatted with a two-column approach, with one column headed “statements” and the other column headed “reasons.” Students may also write sentences (paragraph proof), or use boxes (flow proof), or they may employ other formats, or combine formats, for communicating proof.